As a matter of fact, being weak is almost an asset. If I am weak and God works through me, He gets all the credit and all the glory for anything that happens. In 1st Corinthians 1:26-29, we see the kind of person who God calls to His service:
"For you see your calling, brethren, that not many wise according to the flesh, not many mighty, not many noble are called. But God has chosen the foolish things of the world to put to shame the wise, and God has chosen the weak things of the world to put to shame the things that are mighty; and the base things of the world and the things which are despised God has chosen, and the things which are not, to bring to nothing the things that are, that no flesh should glory in His presence."
Do you see this? God doesn't usually call the powerful, strong, rich, and talented people. If they accomplish things for God, everyone will assume they did it themselves through their strength, ability, and talent. But if He calls the weak, the common, and the ordinary people, and they accomplish great things for Him, then everyone will know that God did it through them.
So what kind of person are you? Are you common? Are you ordinary? Are you weak? Than praise God, because you are just the kind of person God is looking for. You are exactly the kind He wants to call to His service.
To me, that is such a comfort. God can use someone like me. I don't know how He does it, but He does. And God can use someone like you. God can use anyone who is willing, and he will give them His strength - the only strength available for effective spiritual ministry.
Remember what Jesus said in John 15:5? Jesus said, "Without Me you can do nothing." What is He saying? Doe Jesus mean nothing at all? That we can't even tie our own shoes? Obviously if Jesus hadn't given us physical life, not even tying our shoe would be possible. but that's not the meaning. Jesus means we can do nothing of any spiritual consequence without Him working through us. He means we can do nothing that God will bless. And he won't bless anything that he can't take 100% credit for,
So, blessed is the man whose strength is in God. Has God called you to serve Him? Are you relying on His strength? Or your own?