You can't make yourself feel positive, but you can choose how to act, and if you choose right, it builds your confidence
What you're missing is that the path itself changes you.
You can change the world again, instead of protecting yourself from it.
You will never be entirely comfortable. This is the truth behind the champion - he is always fighting something. To do otherwise is to settle.
New tech almost always looks dumb right before it completely changes your life.
Success works as a cycle - growth and contraction, balancing and unbalancing - all while you're encountering hurdles that get higher and higher over time.