A word to the wise ain't necessary - it's the stupid ones that need the advice.
by Johann Wolfgang von Goethe
WAKEN not Amor from sleep! The beauteous urchin still slumbers;
Go, and complete thou the task, that to the day is assign'd!
Thus doth the prudent mother with care turn time to her profit,
While her babe is asleep, for 'twill awake but too soon.