What's the biggest failure in one's life?

Failure; give us the chance to improve our way after removing the mistake which leads us to get failed. Every successful person got failed many times in life. And the failure in our relationship is the worst in life as broken relations can never become good again. 

When turn back and see if we are unable to say that i achived this with confidence then our life is a failure.

As long as the effort never dies, there is no failure. There are only attempts of learning after which success comes. Process is very important.

I know it sounds cliche but i strongly believe there is no failure, but just the stepping stones to success. If i was to think about failure, i would say there is only one failure which is in terms of our relationships- with parents, spouse and kids. Because relationship are never the same even if we get a second chance. These are most delicate and closest to out hearts. 

I wouldnt name it but things might have been different if I had the sense to avert it, I guess thats what is called destiny , when you get into something you know is not going to succeed , with your eyes open !!!!

On the way to success, there will be definitely obstacles. It is true, that I failed several times. But I did not quit.

I also feel that failure is a learning experience and a stepping stone to success. Having said that, if I contemplate and answer the question I would say the biggest failure would be the loss of self among the chaos of life. When you loose touch with self, self love ,self admiration and self respect, you turn lifeless. You just live to aspire, achieve, meet expectations, satisfy ...etc.. without nurturing your soul and giving the due respect to inner beauty

I have failed in many things when I did anything the first time and I have learnt from it. I did not experience a biggest failure yet.

At times I’ve fai in many instances 

Failure is always a part of our lives, be it in personal relationships or materialistic matters. We need to learn how to overcome it and work hard to be successful. Still, I would say losing someone's trust is a greatest failure. It's very difficult to gain trust once it is lost.  

Broken relationships are biggest failures in my opinion