No one could preach if he seriously looked at his own sins.

God can use impure vessels to serve his holiness

A man is called a saint not because he does no longer sin but because he recognizes his weakness and seeks for forgiveness every time he falls

A man is called a sinner not because he sins more than others but because he defends he sins and glories in them and is unwilling to seek forgiveness

It's a sin only if it harms you

It is no use walking anywhere to preach unless our walking is our preaching.