Suppose you're an artist... or some craftsman. You can do stuff. And you're pretty confident with your skills. You have people to prove it. You have clients. You can paid your bills and make a decent living. You've fancy things around you... the list goes on.
Now, imagine you see the work that's better than yours... x10 better, x100 better, infinity times better. What do you feel?
Anxiety, jealousy, depression? ...or maybe inspiration, respect and enlightenment?
The recent one for me was a cold shower feel. Everyone is better. F*ck! Even the monkey can draw better stuff!
It's a hard pill to swallow really. Your confidence is shattered. You don't feel the same anymore. Surprisingly enough after a few days you're back on track. Let's kick some ass, yeah!
I have been through this cycle many times. The details and feelings may vary but you've ups and downs like sine wave. The trick is to get out of 'downs' as soon as possible. Don't let them persuade you. Climb up.