When you give your heart to Christ, the Lord touches your heart, and there is a gifting of His spirit that comes into your life. You are given a divine purpose. When we look at the calling of God over our life, we begin to look at ourselves and how we fall so short of the ability to do what He is calling us to do. In 2 Timothy 1:6-7, it says, "Therefore I remind you to stir up the gift of God which is in you through the laying on of my hands. For God has not given us a spirit of fear, but of power and of love and of a sound mind." God will give you the giftings you need through the power of the Holy Spirit to accomplish what He is calling you to do. So don't fear, but trust the Lord who is able to equip you with everything you need for the call.