I recently came across a story about Pythagoras. Pythagoras was seeking admission to a secret esoteric school of mysticism and, interestingly, he was not allowed! It was denied because of his lack of knowledge on a particular training of fasting and breathing.
As the story goes, Pythegoras was upset and said “”I have come for knowledge, not for any sort of discipline.” School was insisted that no knowledge is knowledge unless it is lived and experienced.
Pythegoras had to concede finally and underwent the fasting as per the norms. It was a new experience for him and he is reported to have admitted “Before this training I could only understand through the intellect, through the head. Now I can feel. Now truth is not a concept to me, but life. It is not going to be a philosophy, but rather, an experience — existential.”