Staying positive increases the chances of our success because in life there are so many things that could hinder our goals and if we don't stay positive this might sabotage all our efforts . Another point there is focusing on achieving our goals in life we go through so many up's and down and if we are not careful this might weigh us down and we feel like the only option is to let go over our goals. Do not prolong things and feel things should be done the next day when clearly there is a chance that it should be done today.

I remember when I was learning a trade it was so hard that I thought maybe I could do it next year but because I was determined I said I am going to sail through it and I did. Self-determination play a very big role in achieving goals. You have a good point there.