Do you not know that to whomever you present yourselves as slaves for obedience, you are slaves to whomever you obey, whether sin, leading to death, or obedience, leading to righteousness?—Romans 6:16
The issue of the lordship of Christ is never presented as an optional addendum to believing faith. It is an essential and functional necessity of it. Billy Graham believed in salvation by faith in Christ alone and walked in obedience to the lordship of Christ simply because Christ alone is Lord and King. Mr. Graham’s deep humility before man was the hallmark of his spiritual humility and obedience to God. As a result, he was endowed with an abundance of the grace of God (see James 4:6).
In the Bible, the call to obey God is first seen in the call of Abram (Genesis 12:1-4). When invited to join God in all He promised, Abram immediately followed God in total obedience. Abram, in fact, did not even know where he was going. He just obeyed and went.
Holman’s Illustrated Bible Dictionary suggests Biblical obedience is “to hear God’s Word and act accordingly.” In human terms, this carries the idea of submitting to a higher authority. In Biblical terms, obedience simply means doing what God says!
In short, if we believe in Him, then we obey Him. He alone is God.