We might be afraid to answer God’s call, but He promises to equip us with everything we will need.
When he was called to lead the Israelites out of Egypt, Moses argued that he was the wrong person for the job because his speaking skills weren’t good (Ex. 4:10). I’ve met people who likewise knew the Lord had called them to do something, but they didn’t believe they could. This is actually a form of rebellion. It amounts to telling God that He isn’t powerful enough to equip you—and that for His will to be accomplished, it depends upon your ability.
God is more than able to equip His followers, but He can achieve His purposes with or without us. He promises that if we believe Him and move forward in obedience, He will reveal what He wants done and enable us to accomplish it. Philippians 2:13 says that God Himself is at work in you, both to desire and to work for His good pleasure. There’s nothing to fear. We never have to take on His work in our own strength, and He won’t assign any task without enabling us. He is committed to equipping His children to do whatever He asks.
As a follower of Christ, you have a personal responsibility to say yes when God calls and to let Him achieve His purposes through you. He won’t let you down. Recalling how He’s worked in your past will strengthen your faith. And His continued work will conform you to the image of His Son.