Sometimes, I felt slightly awkward accepting compliments after playing in an orchestra concert. Although I'd practiced the music and performed it well, I would sometimes think, "I'm just one of 70 people in this ensemble. I only account for about 1.4% of the orchestra's sound."
Then, I'd think, "Well, I contributed what I was supposed to contribute. My 1.4% of the sound turned out fine, so I guess I can relax."
In retrospect, maybe I should have been more relaxed at every concert, knowing that 98.6% of the end result was out of my control.