Promises are like fish
They are to be kept in aquarium; else they slip away!
Promises are like birds
They are to be kept in a cage; else they fly away!
Promises are like snow flakes
They are to be kept in deep freeze; else they melt away!
Promises are like dreams
They are to be viewed in trance; else they fade away!
Ram Chamanooru
http://www.poemhunter.com/poem/empty-promises-5/