2 Cor. 12:9-10
"And He said to me, 'My grace is sufficient for you, and my strength is made perfect in weakness.' Therefore most gladly I will rather boast in my infirmities, that the power of Christ may rest upon me. Therefore I take pleasure in infirmities, in reproaches, in needs, in persecutions, in distresses, for Christ's sake. For when I am weak, then I am strong."

2 Cor. 4:2
" But we have this treasure in earthen vessels, that the excellence of the power may be of God and not of us."

2 Cor. 1:9
"...that we should not trust in ourselves, but in God..."

Trying to be self-sufficient only lasts so long before God makes known how futile all of my efforts to do things on my own are. I'm so thankful that I have a God to depend on and trust in, because without Him, I am nothing...