an car a bha san t-seana mhaide 's duilich a thoirt às

== Scottish Gaelic == === Alternative forms === an car a th' anns an t-seana mhaide, is duilich a thoirt as === Proverb === an car a bha san t-seana mhaide 's duilich a thoirt às you can't teach an old dog new tricks, old habits die hard, a leopard cannot change his spots (literally "the twist which is in the old stick is difficult to take out")