We as humans have huge pride. Sometimes this hinders our growth.
Why good criticism is good for your growth?
1. Sometimes we don't see what others can see because we are sometimes blinded by our own belief systems.
2. We think we know it all. Learn to accept good criticism because there's always room for growth in certain area's.
You'll be very surprised at how much you may not be aware of because sometimes we have to get out of our own little egotistical box.