Whoever wants to be a leader should educate himself before educating others. Before preaching to others he should first practice himself. Whoever educates himself and improves his own morals is superior to the man who tries to teach and train others.
Ali ibn Abi TalibDo not share the knowledge with which you have been blessed with everyone in general, as you do with some people in particular; and know that there are some men in whom Allah, may He he glorified, has placed hidden secrets, which they are forbidden to reveal.
Ali ibn Abi TalibBody is purified by water. Ego by tears. Intellect is purified by knowledge. And soul is purified with love.
Ali ibn Abi Talib