> can I look back into my soul and say that I tried hard enough?

Imagine, if you will a large endless expanse. Clear skies above, but as you look to the floor you realize it's made of people. Compacted like tetris pieces, as far as the eye can see. You're standing there, presumably atop some people right then and there. What do you do? Do you walk forward? You'll step on the bodies; the people. Do you stand still? Won't that invalidate your life? Aren't you allowed to live?

Making that decision is trying hard enough. We all had to do it, and luckily, we did it at an age we can no longer remember; right when we were born. We decided to venture forth and try. You tried hard enough because you tried, period. That is enough.