"Thou art That," declares the Hindu.

The Sufi cries out that by love man and God are one, and know each other.

And all the religions of the world in varied phrase announce the same splendid truth of man's Divinity.
It is on that that Theosophy founds its affirmation that the knowledge of God is possible to man; that the foundation, then, of Theosophy, that the essence of its message.
And the value of it at the time when it was re-proclaimed to the world was that it was an affirmation in the face of a denial.

Where Science began to cry "agnosticism," Theosophy came to cry out "gnosticism." At the very same time the two schools were born into the modern world, and the re-proclamation of Theosophy, the supreme knowledge, was the answer from the invisible worlds to the nescience of Science.

It came at the right time, it came in the right form, as in a few moments we shall see; but the most important thing of all is that it came at the very moment when Science thought itself triumphant in its nescience.
This re-proclamation, then, of the most ancient of all truths, was the message of Theosophy to the modern world.