Either do not attempt at all, or go through with it.

I can't live either without you or with you

I attempt an arduous task; but there is no worth in that which is not a difficult achievement.

I'll go through life either first class or third, but never in second.

there is no regret to try then fail, than to fail without giving a try.

Dialectic thought is an attempt to break through the coercion of logic by its own means.