Acertain

“Climb if you will, but remember that courage and strength are nought without prudence, and that a momentary negligence may destroy the happiness of a lifetime. Do nothing in haste; look well to each step; and from the beginning think what may be the end.”
― Edward Whymper, Scrambles Amongst the Alps

“Learning to ignore things is one of the great paths to inner peace.”
― Robert J. Sawyer, Calculating God