Is it the time yet?

I myself sometimes still has a doubt in my heart when I'm doing something.
There were many times in my way when I's thinking to give up because it seemed like it's stuck and could not move advance.
At that time, I always asked myself this question, "is it the time to stop?"
And then I always tried asking friends about their opinion, but at the end, most of them told me to stop because they said I could not do it. Then I took sometimes off to think clearly, and keep asking myself the same question again while I's reviewing the result of this and then I came up with a new question, "If I stop it now, then when I can see the end?" and "Why should I listen to other while some of them even didn't understand what I's talking about?"
Then somehow I came up with flashing mind that said "You would never ever see the light if you stop it by now, and even you if you failed in the end at least you know that this was a failure, so you will failure even you stop now or later, This is what came to my mind that have the mixed thinking, and then the optimism mind of mine, then told me something that is very interesting,
Why don't you succeed it and prove to them that you will definitely success?"

This way of mindset will give me more confident for myself to move forward and keep my mind open and try to be a problem solver.
Of course there is another reason that will give me ultimate power to move forward that is I must do my best for the person who love my and I loved.

That's why my philosophy is Do the best and never give up.