Part of Spirit (Pars Spiritus)
The Part of Spirit is one of the two most important lots in Hellenistic astrology; the other is the Part of Fortune. The two are mirror images. The Part of Fortune draws on the Moon and describes what happens to you, your body and the circumstances outside your control. The Part of Spirit draws on the Sun and describes what you choose: your intentions, your will, your mind and the life you build through your own effort.
Ancient astrologers also called this point the «daimon», the guiding spirit within a person. The sign of the Part of Spirit shows the style in which you use your will, and its house shows the area of life where you direct your aims and your effort most. It is one of the first places to look for questions about career, vocation and purpose.
You need your birth time and place to calculate the Part of Spirit, because the point is found from the Ascendant. When the time shifts by a few minutes the point shifts by a few degrees, so the more accurate your birth time, the more reliable the result.
How is it calculated?
First we work out whether the birth was by day or by night: if the Sun was above the horizon at the moment of birth (between the 7th and 12th houses) it is a day birth. For a day birth the Part of Spirit is found by adding the distance from the Moon to the Sun to the Ascendant: Ascendant + Sun − Moon. For a night birth the formula is reversed: Ascendant + Moon − Sun.
This is the exact reverse of the Part of Fortune formula, which is why the two points sit at equal distances on either side of the Ascendant: as far as one is ahead, the other is behind. The ruler of the point is the traditional ruler of its sign: Mars for Scorpio, Saturn for Aquarius and Jupiter for Pisces.
How to read the Part of Spirit
When you read the Part of Spirit, start with its sign: it describes how you express your wishes and your will. Then look at its house: the matters of that house are where you invest consciously and try to fulfil yourself. With the Part of Spirit in the 10th house your purpose is bound up with career and public role; in the 4th house, with home and family life.
Then find the ruler of the point. If the ruling planet is strong and at ease in your birth chart, turning intentions into reality comes more easily; if it is under hard aspects, your aims ask for more effort, but that effort helps you grow. Reading the Part of Spirit together with the Part of Fortune lets you see side by side what life gives you and what you build yourself.
The Part of Spirit in the signs
- Aries
- You use your will directly and boldly. When you decide on something you act rather than wait, and you are the one who takes the first step; your aims are the kind that challenge you and ask you to lead.
- Taurus
- Your intentions are aimed at building things that are concrete and lasting. You move patiently, step by step, and want your effort to bring a tangible return. Security, stability and creating value motivate you.
- Gemini
- Your mind is your strongest tool. Learning, talking, writing and moving ideas between people are at the centre of your aims, and your curiosity carries you down many paths.
- Cancer
- You use your will to protect the people you love and to give them a home. Your aims are bound up with emotional security, family and belonging, and your instincts guide your decisions.
- Leo
- You want to express yourself and leave a mark. You feel closest to your purpose when you bring out your creativity, generosity and leadership; a heartfelt wish to shine guides you.
- Virgo
- Your intention is to be useful, to fix and to improve. Your care for detail and your wish to serve are the shape your will takes; a skill you master gives your life meaning.
- Libra
- You fulfil your aims within relationships. Balance, fairness and cooperation are what you seek; you take others into account in your decisions and grow stronger through partnership.
- Scorpio
- Your will is deep and determined. You don't stay on the surface: you want to get to the heart of things and transform them, and even in hard conditions you don't give up on your goal easily.
- Sagittarius
- You are in search of meaning and freedom. You turn towards ideas you believe in, towards learning and teaching and towards journeys that widen your horizon; your aim is to see the big picture of life.
- Capricorn
- Your intentions are long-term and ambitious. You want to build lasting success through discipline, by taking responsibility and climbing step by step; time is on your side.
- Aquarius
- You use your will for a shared purpose and for the future. Stepping outside the usual, changing things together with a community and living your ideas freely set you in motion.
- Pisces
- Your intentions are shaped by intuition and compassion. Serving something greater than yourself and touching people through art, spirituality or care are part of your purpose.
The Part of Spirit in the houses
- House 1
- Your purpose is yourself. Showing who you are, drawing your own path and leaving a mark through your personality are the main theme of your life.
- House 2
- You direct your effort towards creating resources and producing value. Building your own income and becoming clear about what you value give you purpose.
- House 3
- Communication, learning and writing are at the centre of your aims. Siblings, your close circle and everyday connections are where you use your will.
- House 4
- Home, family and roots are bound up with your purpose in life. Building a solid home and carrying on your family's story give you meaning.
- House 5
- Creativity, children, play and romance are where you use your will most vividly. Work through which you express yourself brings you closer to your purpose.
- House 6
- Your purpose is fulfilled through work, skill and service. Building your daily routine, mastering a craft and looking after your health matter.
- House 7
- Relationships and partnerships are the stage of your purpose. What you build together with others is greater than what you could build alone.
- House 8
- Depth, transformation and shared resources test your will. Coming out of crises stronger and understanding what is hidden give you purpose.
- House 9
- Belief, philosophy, higher education and long journeys are at the centre of your aims. You want to turn what you learn into a meaningful view of the world.
- House 10
- Career and public role are the most visible side of your purpose. Earning a place in your profession and being recognised for your work guide you. Traditionally this is considered a very strong placement.
- House 11
- Friendships, communities and hopes for the future are where you use your will. Moving towards shared goals as part of a team gives you meaning.
- House 12
- Your aims are often fulfilled behind the scenes, quietly. Your inner world, spirituality, working alone and helping others unseen matter.
Frequently asked questions
What is the Part of Spirit?
The Part of Spirit (Pars Spiritus) is a point calculated in Hellenistic astrology from the Ascendant, the Sun and the Moon. It describes your will, your intentions, your mind and the path you consciously choose in life, and it stands out in questions about career and purpose.
What is the difference between the Part of Spirit and the Part of Fortune?
The Part of Fortune draws on the Moon and describes circumstances outside your control, the body and what happens to you. The Part of Spirit draws on the Sun and describes your choices and actions. Their formulas are the reverse of each other, which is why the two sit at equal distances on either side of the Ascendant.
Do I need my birth time for the Part of Spirit?
Yes. Because the point is calculated from the Ascendant, you need your birth time and place. A difference of a few minutes can move the point by a few degrees; an accurate time matters especially when it is close to the edge of a sign or house.
Why does the ruler of the Part of Spirit matter?
A lot has no light of its own; it works through the planet that rules it. If the ruler of the sign holding the Part of Spirit is strong in your birth chart, turning intentions into reality is easier; if it struggles, your aims ask for more effort.