Deuteronomy 8:17-18 - "You may say to yourself, "My power and the strength of my hands have produced this wealth for me." But remember the LORD your God, for it is he who gives you the ability to produce wealth, and so confirms his covenant, which he swore to your forefathers, as it is today." (NIV)
For as much as we sometimes put ourselves down and beat ourselves up when we make mistakes, we also can put too much emphasis on our own abilities when good things happen. Humility and giving glory to God for the good stuff is a part of our Christian walk. Sure we can be proud of ourselves. Even if you are humbled before God, we should still feel good when we do well. Yet, we cannot forget for a moment that it was God that gave us the abilities we have. He deserves our praise for giving us skills and the right circumstances for us to use to succeed.