Accomplishing healthy change in churches for the glory of God and the clarity of the Gospel does not happen in the first year after the new pastor arrives. God is working for eternity, and He has been working from eternity. He's not in a hurry, and we shouldn't be either. So it is wise to show care for the congregation and concern for the unity of the church by not running so far ahead of them that people start falling behind. Run at a pace that the congregation can keep.