God desires to use you. God transforms your human weakness into His amazing grace and power when you decide to serve Him. 2 Cor "My grace is sufficient for you, for my power is made perfect in weakness.
"I bought a nice leather journal for my missionary and wrote these on the first two pages. He loves it and tells me all the time how comforting these scriptures are!" Sounds like this might be handy to have.
Life is all about balancing the bad with the good. We need to reflect on constructive criticism but not allow it to be destructive. We need to enjoy the good, but not allow it to keep us from reflection or growth.