The goal of all life is to have a ball.

You mainly feel the way you think.

It is only in your mind that you have to excel, at anything or everything. Of course, it would be very nice to excel at most things. Indeed, we recommend that you try and do your best. But realistically, you are entitled to do the bare minimum to get by. All your accomplishments are just a bonus, something to enjoy, not requirements. You don't have to do anything to prove that you are worthy of existing.

Worrying about dying will hardly help you live.

Most things worth having require some sacrifice, usually more than you expect.

In fact most of what we call anxiety is overconcern about what someone thinks of you.

Life is indeed difficult, partly because of the real difficulties we must overcome in order to survive, and partly because of our own innate desire to always do better, to overcome new challenges, to self-actualize. Happiness is experienced largely in striving towards a goal, not in having attained things, because our nature is always to want to go on to the next endeavor.