Be wise with speed; a fool at forty is a fool indeed.  Edward Young quotes
Forty is the old age of youth; fifty is the youth of old age. Victor Hugo quotes Age is opportunity no less than youth itself. Henry Wadsworth Longfellow quotes A diplomat is a man who always remembers a woman's birthday but never remembers her age. Robert Frost quotes The secret of genius is to carry the spirit of the child into old age, which means never losing your enthusiasm. Aldous Huxley quotes Age is a matter of feeling, not of years. George William Curtis quotes At 20 years of age the will reigns; at 30 the wit; at 40 the judgement. Benjamin Franklin quotes To me, old age is always 15 years older than I am. Bernard M. Baruch quotes At the age of 20, we don't care what the world thinks of us; at 30, we worry about what it is thinking of us; at 40, we discover that it wasn't thinking of us at all. Anonymous quotes | 
