By three methods we may learn wisdom: First, by reflection, which is noblest; Second, by imitation, which is easiest; and third by experience, which is the bitterest.
Prophet Muhammad (peace be upon him) said: By his good character a believer will attain the degree of one who prays during the night and fasts during the day.
Wisdom is not finally tested by the schools, Wisdom cannot be pass'd from one having it to another not having it, Wisdom is of the soul, is not susceptible of proof, is its own proof.
It is not enough to prove something, one also has to seduce or elevate people to it. That is why the man of knowledge should learns how to speak his wisdom: and often in such a way that it sounds like folly!
Never do I argue with a man with a desire to hear him say what is wrong, or to expose him and win victory over him. Whenever I face an opponent in debate I silently pray - O Lord, help him so that truth may flow from his heart and on his tongue, and so that if truth is on my side, he may follow me; and if truth be on his side, I may follow him.