Character is the indelible mark that determines the only true value of all people and all their work.
— Orison Swett Marden

We must, however, acknowledge, as it seems to me, that man with all his noble qualities... still bears in his bodily frame the indelible stamp of his lowly origin.
Charles Darwin indelicate quote

Every stress leaves an indelible scar, and the organism pays for its survival after a stressful situation by becoming a little older.
— Hans Selye

The trouble with most comedians who try to do satire is that they are essentially brash, noisy and indelicate people who have to use a sledge hammer to smash a butterfly.
— Imogene Coca

Memory is more indelible than ink.
— indelicate quotation by Anita Loos