Don't waste your life in doubts and fears: spend yourself on the work before you, well assured that the right performance of this hour's duties will be the best preparation for the hours or ages that follow it.

No longer forward nor behind
I look in hope and fear;
But grateful take the good I find,
The best of now and here..

It is not work that kills men, it is worry. Work is healthy; you can hardly put more on a man than he can bear. But worry is rust upon the blade. It is not movement that destroys the machinery, but friction.

Be just, and fear not. 

Let all the ends thou aim'st at be thy country's,
Thy God's and truth's.

Never let life's hardships disturb you ... no one can avoid problems, not even saints or sages.

Ask yourself this question:
"Will this matter a year from now?"