The wisdom of the 33rd degree encompasses a broad spectrum of knowledge, from the symbolism of ancient cultures to spiritual alchemy, number mysticism and esoteric interpretations of religious texts.
Interestingly, this knowledge is not just about abstract concepts. The 33rd degree Freemasons see it as a tool for personal and spiritual development. It is a way to understand the hidden connections in life and to realise one's full potential.
However, it's only one of many "secret teachings" that are now available to everyone thanks to the Internet. 😉