Let him that would move the world first move himself.
Let him that would preach patience and the overcoming of obstacles first be patient and overcoming. Let him walk before he talks about walking.
Would you trust a doctor with no medical history? Would you trust a writer who does not read? Would you trust a philosopher who does not first prove they think? So too you should not blindly trust the man that wants to move the world. First see if he’s moved himself.