Two wrongs don't make a right, but they make a good excuse.
Knowledge is gained by learning; trust by doubt; skill by practice; love by love.
Happiness is an imaginary condition, formerly often attributed by the living to the dead, now usually attributed by adults to children, and by children to adults.
The stupid neither forgive nor forget; the naive forgive and forget; the wise forgive but do not forget.
A child becomes an adult when he realizes that he has a right not only to be right but also to be wrong.