“格言的”的英语？

他有背诵格言的癖好.He has a hobby for storing up sayings in his mind.格言的内容不完全固定.The list of maxim is not settled.在艾伦当初听到这句格言的时候, 它还只是一颗鹅卵石.When he had heard the quotation, it was a pebble....