Eggs and vows are easily broken. - Japanese Proverb

In the midst of great joy, do not promise anyone anything. In the midst of great anger, do not answer anyone's letter. - Chinese Proverb

A promise is a debt. - Irish Proverb

He who is slowest in making a promise is most faithful in its performance. - Jean Jacques Rousseau

The smallest actual good is better than the most magnificent promise of impossibilities. - Thomas Babington Macaulay

The nicest thing about the promise of spring is that sooner or later she'll have to keep it. - Mark Beltaire

Where there is an unknowable, there is a promise. - Thornton Wilder

Promise a lot and give even more. - Anthony J. D'Angelo

Losers make promises they often break. Winners make commitments they always keep. - Denis Waitley

I had rather do and not promise than promise and not do. - Arthur Warwick

An acre of performance is worth a whole world of promise. - W. D. Howells