You may be disappointed if you fail, but you will be doomed if you don’t try.

...if we never try, we shall never succeed.

We cannot be sure of having something to live for unless we are willing to die for it.

If we don't succeed, we run the risk of failure.B

Life is absolutely unbearable. And we're going to die.

If you believe you will fail, there is no hope for you. You will.

thus, in a sense, we are all doomed. even if we stay away from black holes

Are we all destined to die as failures? Just

If we don't end war, war will end us.

Sooner or later the realization comes that nothing we can think of is going to do it.

We all end up dead, it’s just a question of how and why.

Even if we could turn back, we'd probably never end up where we started.

The dead teach this great lesson, which we are loathe to learn: we too will die.

He who refuses to embrace a unique opportunity loses the prize as surely as if he tried and failed.