Be not disturbed at being misunderstood; be disturbed rather at not being understanding

The person who says it cannot be done should not interrupt the person doing it

Be not afraid of going slowly; be only afraid of standing still.

If you don't want anyone to know it, don't do it

Do not anxiously hope for that which is not yet come; do not vainly regret what is already past

The one who understands does not speak; the one who speaks does not understand