Anybody or anything may stand between you and knowledge if you are unfit for it.
If you want to strengthen an enemy and make him exult - hate him.
There is a Persian proverb: 'To test that which has been tested is ignorance.' To try to test something without the means of testing is even worse.
Enlightenment must come little by little - otherwise it would overwhelm.
But one may say something and yet not be able to do it. Try, for instance, lifting yourself up by the bootstraps.
The Sufi is One who does not care when something is taken from him, but who does not cease to seek for what he has not.