What you come to know in meditation is usually no different from the facts you already know about. Sometimes, you already 'know' about what you are going to realise. What is different is the intensity, the quality of knowing.
Quality of knowing (difference between the knowing of an inventor, and of the person who copies the formula and applies it in the laboratory to testify results) is one aspect of knowing that is usually not generally recognised, at least not in the same way it is recognised/required in meditation, u know. In schools though each talented teacher would appreciate and inculcate a better quality of knowing, a better/living appreciation of the same facts in the pupil ... but the field is too vast to begin with in context of meditation. In meditation one needs a dynamic mind, a persistent and objective mind. A mind predisposed to be free from biases, at least an inclination for it. An open mind-a quality that is helped from a loving empathetic attitude, from being positive and not selfish. All these things help.
Meditation makes all the difference between intellectual word play, and actual experiential understanding. One does not get actual experiential understanding of the mystic concepts as the immediate step from the intellectual induction. One progresses slowly on this path, from intellect to experiential understanding, until one begins to advance.
So even if you 'know', see if you can 'apply'
You will find yourself revisiting facts, you will look at same things differently, as if not just with greater depth, but greater vastness, with vision and clarity of detachment. Things bereft of essence, wisdom of non-self
