Learn from your mistakes or make more mistakes?

It seems like we learn through making mistakes, but how are we to learn if there's no right nor wrong. Only once in a life chance to make the right decision at that situation, if wrong may in fact destory your whole life.

Why is life so fragile?

It is become a common sense that once cry = pain or death? Why can we ignore it and move on. Like a paper cut, sometimes you notices it and sometime you don't until it bleeds.

If life is a path of choices to make then i think i've miss out on a lot of choices. Placed in front of us just that we didn't realise. Why do we not enjoy the state that we're in or why do we enjoy the past that we suffered.

Question in life that can't be explain is only a lame excuse to look back and not move on, but seems like i'm stuck at that position. Looking back and not ahead.

Should i be a pessimism or a optimist about my future?