Let me ask you to think for a while on the place of Yoga in its relation to two of the great Hindu schools of philosophical thought, for neither the Westerner nor the non-Sanskrit-knowing Indian can ever really understand the translations of the chief Indian books, now current here and in the West, and the force of all the allusions they make, unless they acquaint themselves in some degree with the outlines of these great schools of philosophy, they being the very foundation on which these books are built up.

Take the Bhagavad-Gita. Probably there are many who know that book fairly well, who use it as the book to help in the spiritual life, who are not familiar with most of its precepts.

But you must always be more or less in a fog in reading it, unless you realise the fact that it is founded on a particular Indian philosophy and that the meaning of nearly all the technical words in it is practically limited by their meaning in philosophy known as the Samkhya.

There are certain phrases belonging rather to the Vedanta, but the great majority are Samkhyan, and it is taken for granted that the people reading or using the book are familiar with the outline of the Samkhyan philosophy. I do not want to take you into details, but I must give you the leading ideas of the philosophy.

For if you grasp these, you will not only read your Bhagavad-Gita with much more intelligence than before, but you will be able to use it practically for yogic purposes in a way that, without this knowledge, is almost impossible.

Alike in the Bhagavad-Gita and in the Yoga-sutras of Patanjali the terms are Samkhyan, and historically Yoga is based on the Samkhya, so far as its philosophy is concerned. Samkhya does not concern itself with, the existence of Deity, but only with the becoming of a universe, the order of evolution. Hence it is often called Nir-isvara Samkhya, the Samkhya without God.

But so closely is it bound up with the Yoga system, that the latter is called Sesvara Samkhya, with God. For its understanding, therefore, I must outline part of the Samkhya philosophy, that part which deals with the relation of Spirit and matter; note the difference from this of the Vedantic conception of Self and Not-Self, and then find the reconciliation in the Theosophic statement of the facts in nature.

The directions which fall from the lips of the Lord of Yoga in the Gita may sometimes seem to you opposed to each other and contradictory, because they sometimes are phrased in the Samkhyan and sometimes in the Vedantic terms, starting from different standpoints, one looking at the world from the standpoint of matter, the other from the standpoint of Spirit.

If you are a student of Theosophy, then the knowledge of the facts will enable you to translate the different phrases. That reconciliation and understanding of these apparently contradictory phrases is the object to which I would ask your attention now.