Wù yǐ shàn xiǎo ér bù wéi, yī jù gǔlì de huà yě néng wēnnuǎn rénxīn.
Never think a good deed too small to do - a single word of encouragement can warm the heart.
Tips
history
From the deathbed edict of Liu Bei 刘备, founder of Shu Han, to his son Liu Shan, recorded in the 《三国志》: 勿以恶小而为之，勿以善小而不为 - 'Do no evil, however small; miss no good, however small.' Often cited as the textbook Confucian injunction on moral consistency.
usage
Almost always paired with its twin 勿以恶小而为之. Standard material for moral-education posters, primary-school textbooks, and civic campaigns.
