Before Jesus began preaching the gospel of the Kingdom and performing the signs that showed He was from God, He was sanctified by the Father and sent into the world (John 10:36-38). He was set apart to do all that He did, including preaching. This sanctification explains why His preaching had any effect: both the content of His message and the power to deliver it came from the Father, just as all His words and works had their source in the Father (Luke 18; John 5:19, 30, 36-37; 8:18, 28, 38; 12:49). The lesson is that regardless of the human instrument or method God uses, it is the Father who preaches the gospel. Without that sanctification and submission to God's leadership, the work is merely human and the workers labor in vain (Psalm 127:1). Jesus' example shows that the work of God is accomplished through submission, not human effort or will. Believers likewise have been sanctified by God, and their focus should be on that sanctification, becoming holy and going on to perfection so that they are spiritually worthy and usable by God in whatever capacity He ordains. Like Jesus, the goal is always to do the will of the Father.