Some Wonderful C S Lewis quotes from "Mere Christianity."

“When we Christians behave badly, or fail to behave well, we are making Christianity unbelievable to the outside world.”
 
“Everyone says forgiveness is a lovely idea, until they have something to forgive.”
 
“If they are wrong they need your prayers all the more; and if they are your enemies, then you are under orders to pray for them. That is one of the rules common to the whole house.”
 
“My argument against God was that the universe seemed so cruel and unjust. But how had I got this idea of just and unjust? A man does not call a line crooked unless he has some idea of a straight line. What was I comparing this universe with when I called it unjust?”
 
“And out of that hopeless attempt has come nearly all that we call human history—money, poverty, ambition, war, prostitution, classes, empires, slavery—the long terrible story of man trying to find something other than God which will make him happy.” ― C.S. Lewis, Mere Christianity