" The saying signifies first and foremost that no exoteric teaching is capable of providing true knowledge, which man must find only within himself, for in fact no knowledge can be acquired except through a personal comprehension. Without this comprehension, no teaching can lead to an
effective result, and the teaching that awakens no personal resonance in the one who receives it cannot give any kind of knowledge. This is why Plato says that 'everything that a man learns is already within him'. All the experiences, all the external things that surround him, are only an occasion to help him become aware of what is within himself. This awakening he calls
anamnesis
, which signifies 'recollection'. "

― René Guénon ,