When God called to Moses from a burning bush his whole world changed as God asked him to do what he did not want to do. That something was to return to Egypt and lead the Hebrew people out of bondage. Moses was wanted for murder in Egypt and he felt inadequate for the task. He argued with God about his abilities and fears. Learning to trust in God is not always easy. When Moses trusted God then he became an instrument of God’s power and authority.
When God calls any of us it is because we already have the ability even if we do not know it at the time. All we need to do is trust and begin the task.