It is never too late to be what you might have been. George Eliot
It is never too late to be wise. Daniel Defoe
Life's Tragedy is that we get old to soon and wise too late. Benjamin Franklin
When you are thirsty, it is too late to think about digging a well. Japanese Proverb
If you tell the truth too early, you are laughed at, too late and you are stoned. Persian Proverb
It's never too late to mend. English Proverb