Only the person who has faith in himself is able to be faithful to others.  Erich Fromm quotes Take note, theologians, that in your desire to make matters of faith out of propositions relating to the fixity of sun and earth you run the risk of eventually having to condemn as heretics those who would declare the earth to stand still and the sun to change position - eventually, I say, at such a time as it might be proved that the earth moves and the sun stands still. Galileo Galilei quotes When faith is lost, when honor dies, the man is dead. John Greenleaf Whittier quotes Immediately it stuck into my mind, 'Leave off preaching. How can you preach to others, who have not faith yourself? I asked Boehler, whether he thought I should leave it off or not. He answered 'By no means.' I asked, 'But what can I preach?' He said, 'Preach faith till you have it; and then, because you have it, you will preach faith.' John Wesley quotes And strive hard in (the way of) Allah, (such) a striving a is due to Him; He has chosen you and has not laid upon you an hardship in religion; the faith of your father Ibrahim; He named you Muslims before and in this, that the Apostle may be a bearer of witness to you, and you may be bearers of witness to the people; therefore keep up prayer and pay the poor-rate and hold fast by Allah; He is your Guardian; how excellent the Guardian and how excellent the Helper! (The Pilgrimage 22.78) Koran quotes A compassionate government keeps faith with the trust of the people and cherishes the future of their children. Lyndon B. Johnson quotes Faith must be enforced by reason. When faith becomes blind it dies. Mahatma Gandhi quotes Nothing so cements and holds together all the parts of a society as faith or credit, which can never be kept up unless men are under some force or necessity of honestly paying what they owe to one another. Marcus Tullius Cicero quotes The truth of our faith becomes a matter of ridicule among the infidels if any Catholic, not gifted with the necessary scientific learning, presents as dogma what scientific scrutiny shows to be false. St. Thomas Aquinas quotes Faith is to believe what you do not see; the reward of this faith is to see what you believe. St. Augustine quotes | 
