勿以恶小而为之， 勿以善小而不为

勿以恶小而为之， 勿以善小而不为

wù yǐ è xiǎo ér wéi zhī wù yǐ shàn xiǎo ér bù wéi

Do not think any vice trivial, and so practise it; do not think any virtue trivial, and so neglect it.