A.c. Grayling said this quote

Do not regret having lived, but while yet living live in a way that allows you to think that you were not born in vain.And do not regret that you must die: it is what all who are wise must Wish, to have life end at its proper time.For nature puts a limit to living as to everything else, And we are the sons and daughters of nature, and for us therefore the sleep of nature is nature's final kindness