Describe a time in your life when you have felt overconfident about a decision you made. why do you think you held so tightly to your decision?

The moment when I felt confident about a decision made by me:

It was during my 12th standard, I was about to decide if I have pursued Engineering or Medicine. Many of my relatives suggested me to go for Medicine, as they thought it is the only profession where you could make more money and be successful.

My passion is to become an engineer. I was too confident and thus opted for Engineering, though my parents were unhappy with the decision. But as soon as they saw my progress in studies, as well as my project, works they understood me very well and supported a lot. At last, after my graduation, I was happy that I had gone through all the negatives and got a good job.