We find many forms for one Deva, just because of the fact that the God makes the form he wants for the particular work he has upon hand, and that none of those forms bind him. They are merely transitory vehicles created for a definite purpose. Some of these forms are indeed relatively permanent, partly because of the worship which is addressed to them. For the Deva will often graciously use a particular form in order to meet the thought of his worshippers. Suppose for instance, taking a lofty example, that Shrî Kṛiṣhṇa willed to reveal Himself to some Bhakta of His, in order that that devotee might have the joy of consciously realising the presence of his Lord, He then most certainly would clothe Himself in the form which that Bhakta was in the habit of worshipping and which drew up the deepest emotions of his heart. For these forms are taken for the very purpose of stimulating devotion, for the very object of attracting the heart by presenting the illimitable Deity in some conditioned form which the concrete mind of man is able more or less to grasp, to understand, to admire and to worship. You cannot love the void of space. You cannot fix your heart on the depths of infinity; you deceive yourself if, with your limited intelligence, untrained even in the lowest forms of Yoga, you think that you can realise Brahman, the Supreme. Too often when we speak of THAT, no real thought responds to our speaking; the lips speak, not the intelligence or the heart. Step by step we have to climb from the manifested to the unmanifested, and, in His compassionate love, God veils Himself in forms of beauty to attract the human heart, in order that the human heart may rise adoringly to His Feet, and that some portion of His life, pouring down thereinto, may enable the Self of the worshipper to realise even partially its unity with Him. The Devas, then, in their many ranks and divisions, perform functions according to their grade. Speaking generally, their work in the world is to guide evolution according to the design of Íshvara. That really sums up their functions, although we are going to study them in detail. I say nothing of the vast functions of the higher Devas that lie beyond our knowing, beyond the teaching that Ṛishis have given. I deal only with those lower functions that are concerned with our world, and with the solar system of which our world is part. Taking that limitation, suitable to our ignorance, we can study some of the functions of the Gods within the limits of our solar system.