"But God hath chosen the foolish things of the world to confound the wise; and God hath chosen the weak things of the world to confound the things which are mighty". 1 Corinthians 1:17
The Bible tells us that the Lord uses "weak and foolish" things. When we come into a relationship with Him, we don't automatically become perfect. We start a process. We start a process of growth and transformation. It begins at the moment of the new birth and continues on throughout the rest of our lives.
The Lord sees our hearts. He sees our desire for Him. He sees our availability. Therefore, He begins at that point to use us. He doesn't wait until we become perfect or even fully mature. (If He did, He would find no one to do His work.) He uses us just as we are and in the meantime, He keeps working on us to "perfect what concerns us".
Being weak and foolish doesn't exempt us from being used by the Lord. Being imperfect doesn't exempt us. Being frail and human doesn't exempt us. The fact that we don't know everything and haven't "arrived" doesn't exempt us. He uses our willingness and through it shows His exceeding great glory. It is through our imperfection that the excellency of His power is seen--- not us.
Have a great day. The Lord doesn't wait for us to become perfect before He uses us in His work. He still uses us in our imperfect state.
Scripture reference:
2 Corinthians 4:7
Psalm 138:8