The Ancient Greeks rise like a Phoenix in every generation which is looking for new inspiration.
At the end of the middle ages the world needed new understanding of what a human being is and what a proper politically and religious system might be. It went to the Greeks for inspiration. They survive and thrive through the most contrary ages between pagan Rome, Athens, Christian Europe, then the Renaissance ages.
This is because the sparks of holiness of wisdom and beauty and royalty fell to ancient Athens. Similarly when an age need new spiritual inspiration they go to the ancient Hindus. They also arise Phoenix like in every searching generation. Even in the Jewish world to understand what people are talking about one needs to go to the ancient Hindus otherwise you know you are getting information second and third and that has been watered down and the Hindu names attached to the doctrines are taken out and the teachings are then ascribed to Kabalah.

German philosophers are like that also.

For better or worse even in the Jewish world people think in Nietzschian terms of "self esteem" and the "ego" and "Id" and "subconscious" and "life style" and "values" and "commitments and goals"all easily tranced to Nietzsche and appropriated by Freud and other later thinkers. (No books before Nietzsche said that you are thinking thoughts that you don't know you are thinking. The discovery of the Id goes directly to Nietzsche.) Even the modern gurus had go the Nietzsche for the subconscious and the Id.

My complaint about all this is that I am not much of a fan of Nietzsche. Nor Hegel which are the sources of most Jewish though today (The ideal of the state of Israel being the realization of the spirit of Israel, Rav Kook got from Hegel the state being concrete essence of the Spirit of God in the world.)