If you search for it and seek it…..,
The future holds promise……,
But if sadness haunts you……,
From past experiences…..,
You must move on……,
And try to forget…..,
Still you should be grateful…..,
Honored and thankful…..,
To have the both of them…..,
The former and the latter……,
Tomorrow and Yesterday…..,
Many are not nearly as lucky…..! ! ! !

Trade Martin

http://www.poemhunter.com/poem/poem-for-tomorrow-and-yesterday/