To make mistakes is human; to stumble is commonplace; to be able to laugh at yourself is maturity.
William Arthur Ward
Men occasionally stumble over the truth, but most of them pick themselves up and hurry off as if nothing had happened.
Winston Churchill
We may stumble and fall but shall rise again; it should be enough if we did not run away from the battle.
Mahatma Gandhi

Life is truly known only to those who suffer, lose, endure adversity and stumble from defeat to defeat.
Anais Nin
Our incomes are like our shoes; if too small, they gall and pinch us; but if too large, they cause us to stumble and to trip.
John Locke
Everybody knows if you are too careful you are so occupied in being careful that you are sure to stumble over something.
Gertrude Stein