What is to come we know not. But we know
That what has been was good--was good to show,
Better to hide, and best of all to bear.
We are the masters of the days that were:
We have lived, we have loved, we have suffered . . . even so.

Shall we not take the ebb who had the flow?
Life was our friend. Now, if it be our foe -
Dear, though it spoil and break us!--need we care
What is to come?

Let the great winds their worst and wildest blow,
Or the gold weather round us mellow slow:
We have fulfilled ourselves, and we can dare
And we can conquer, though we may not share
In the rich quiet of the afterglow
What is to come.

William Ernest Henley

http://www.poemhunter.com/poem/what-is-to-come/