Danh ngôn của Robert W. Service (Sứ mệnh: 2)

Be sure your wisest words are those you do not say.
It's the steady, quiet, plodding ones who win in the lifelong race.
A promise made is a debt unpaid.
No man can be a failure if he thinks he's a success; If he thinks he is a winner, then he is.
It isn't the mountain ahead that wears you out; it's the grain of sand in your shoe.
Write verse, not poetry. The public wants verse. If you have a talent for poetry, then don't by any means mother it, but try your hand at verse.