Some Cayce quotes to get you started:
DO NOT hold the idea, "Well, I know what they are going to say or do, but I'll do as best I can." Disregard that! KNOW the spirit with which YE do a thing is the spirit that will respond to thee! (1688-9)
The Spirit is the movement; as when God the First Cause – called into being LIGHT as a manifestation of the influences that would, through their movement (light movement) upon forces yet unseen, bring into being what we know as the universe – or matter; in all its forms, phases, manifestations. (262-119)
Spirit is the First Cause, the primary beginning, the motivative influence, – as God is Spirit. (262-123)
For movement is the effect of spirit. Spirit is life. (705-2)
For matter is the expression of spirit MOVING in the material world. (520-4)
For as there is indicated, it is the MOVEMENT of spirit upon things that do not appear that has brought into being the things that DO appear … (1486-1)
In the beginning there was the force of attraction and the force that repelled. Hence, in man's consciousness he becomes aware of what is known as the atomic or cellular form of movement about which there becomes nebulous activity. And this is the lowest form (as man would designate) that's in active forces in his experience. Yet this very movement that separates the forces in atomic influence is the first cause, or the manifestation of that called God in the material plane!
Then, as it gathers of positive-negative forces in their activity, whether it be of one element or realm or another, it becomes magnified in its force or sources through the universe.
Hence we find worlds, suns, stars, nebulae, and whole solar systems MOVING from a first cause. (262-52)
For, thou art in thyself divine! The mere fact or knowledge of thy existence in a material world, prompted by the activities or the movement of the Spirit itself, indicates thy own divinity; but to be attained! (1709-3)
For as the individual entity, or soul, is Spirit, so its end – or at the beginning and the end – is Spirit. (262-113)
… ESSENCE of the entity itself, ITS spirit and soul – its spirit being its portion of the Creator, its soul that of its entity itself, making itself individual, separate entity, that may be one WITH the Creative Force from which it comes – or which it is! of which it is made up, in its atomic forces, or in its very essence itself! (364-10)
(Q) Explain the law of the line of demarcation between soul and spirit.
(A) This is one, yet distinct – even as the Father, the Son, the Holy Spirit is one, yet is the manifestation of a force that is capable of manifestation in the varied planes of development. The soul is an individual, individuality, that may grow to be one with, or separate from, the whole. The spirit is the impelling influence of infinity, or the one creative source, force, that is manifest. Hence we find that in the physical plane we seek soul manifestation as the spirit moves same in activity. (5749-3)
Thus as has been indicated, the Spirit pushed into matter – and became what we see in our three-dimensional world as the kingdoms of the earth; the mineral, the vegetable, the animal – a three-dimensional world. And that which beareth witness is the Spirit of Truth, the Spirit of Light. For He said, "Let there be light; and there was light." Then indeed there is no power that emanates that is not from God. Then what is this Spirit of Rebellion, what is this Spirit of Hate? What is this Spirit of Self-Indulgence? What is this Spirit that makes men afraid? SELFISHNESS! Allowed, yes, of the Father. For, as given, He has not willed that the souls should perish but that we each should know the truth – and the truth would make us free. Of what? Selfishness! (262-114)
All SPIRIT is ONE. How? Just as all force, all power emanates from that influence, that essence, that consciousness, that awareness which the consciousness of man – or man as the image of the Creator – worships. (262-115)
Keep the attunement to the spiritual forces, for it is the SPIRIT that gives life – but life in a physical functioning is of physical reaction. (2095-1)
(Q) Is there any advice I can now have to live better in the eyes of God and man?
(A) As we have indicated again and again – thou knowest the faith – thou understandest. Live not only by the letter of the law but the spirit of same. For, the letter maketh afraid – the spirit giveth life. (257-229)
For, as He hath given – if ye would know the Spirit, or God, search for Him; for happy ye will find Him. Thus – in that consciousness of daily living and being that which is in keeping with the ideal-life and its problems becomes not a burden, but opportunities – for the greater expressions and expansions of self in knowing that as ye sow daily the fruit of the spirit, ye need not worry nor fret thyself as to its growth. God giveth the increase. Hence be not weary in well-doing. (641-6)
(Q) Has any progress been made in the last two or three incarnations?
(A) There is progress whether ye are going forward or backward! The thing is to move! (3027-2)
… there is no time in spirit, see? (281-55)
What is effective or active in spirit (where it forms first) must be active and must influence the imaginative influences of an individual entity. For the entity finds itself a body, a mind, a soul – three; or the earth consciousness as a three-dimensional plane in one. So man's concept of the Godhead is three-dimensional – Father, Son and Holy Spirit. The communication or the activity or the motivating force we find is three-dimensional – time, space and patience. Neither of these exists in fact, except in the concept of the individual as it may apply to time or space or patience. (4035-1)
For the spirit is life; the mind is the builder; the physical is the result. (349-4)