If a problem is fixable, if a situation is such that you can do something about it, then there is no need to worry. If it's not fixable, then there is no help in worrying. There is no benefit in worrying whatsoever.
The two worst strategic mistakes to make are acting prematurely and letting an opportunity slip; to avoid this, the warrior treats each situation as if it were unique and never resorts to formulae, recipes or other people's opinions.
Endure what life God gives and ask no longer span;
Cease to remember the delights of youth, travel-wearied aged man;
Delight becomes death-longing if all longing else be vain.
We may act sophisticated and worldly but I believe we feel safest when we go inside ourselves and find home, a place where we belong and maybe the only place we really do.
Knowledge and understanding are life's faithful companions who will never prove untrue to you. For knowledge is your crown, and understanding your staff; and when they are with you, you can possess no greater treasures.
Every day I remind myself that my inner and outer life are based on the labors of other men, living and dead, and that I must exert myself in order to give in the same measure as I have received and am still receiving.
Said a skunk to a tube-rose, "See how swiftly I run, while you cannot walk nor even creep."
Said the tube-rose to the skunk, "Oh, most noble swift runner, please run swiftly!"