Great book of quotations and wisdom for just about anyone, in any circumstance: "Good Advice," by William Safire and Leonard Safir (brothers). This is from the preface....
"It is the duty, and ought to be the pleasure, of age and experience to warn and instruct youth and to come to the aid of experience. When sailors have discovered rocks or breakers, and have had the good luck to escape with life from amidst them, they, unless they be pirates or barbarians as well as sailors, point out the spots for the placing of buoys and of lights, in order that others may not be exposed to the danger which they have so narrowly escaped. What man of common humanity, having by good luck, missed being engulfed in a quagmire or quicksand, will withhold from his neighbors a knowledge of the peril without which the dangerous spots are not to be approached?"
"Advice to Young Men And (incidentally) To Young Women In The Middle and Higher Ranks Of Life." 1829