A person can always improve himself. (Leo Tolstoy, A Calendar of Wisdom, 13 March)
The man who makes no mistakes does not usually make anything. (Edward John Phelps in One More Day by Sefra Kobrin Pitzele, 6 April)
I shall not pass this way again;
Then let me now relieve some pain,
Remove some barrier from the road,
Or brighten someone's heavy load.
(Eva Rose York in One More Day by Sefra Kobrin Pitzele, 26 February)