We are limited by knowledge, not by courage.

If you don't have the confidence to ask, you will never have the confidence to convince.

You have your God, I have my guts.

Ability, experience and books have solution for all the problems.

People enjoy convincing others, if others are wrong they convince them towards right, if others are already right they still want to convince them towards wrong.

If you value your words, people will not ask you to make any promises.