"I am the LORD: that is my name…” (Isa.42:8a)
God has many names, but, according this verse, this is the one He prefers. Probably because, if spoken in sincerity, it indicates not only a personal relationship with Him, but an acknowledgment of chosen obedience to Him. Romans 10 tells us that our confession of Him in salvation should include recognition of His Lordship (10:9). Salvation is not just an exchange of our sins for His righteousness; it's a surrender of our will to His.
My husband sometimes compares the Lordship of Christ in our lives to a woman's promise at the marriage altar to love, honor, and obey her husband (for those who even do that anymore). She may not fulfill her commitment at all times, but that does not nullify the vow she made. In the same way, I took Jesus Christ as my Savior and Lord many years ago, and that sealed forever our relationship as Father and child. Through the years, I have not always lived up to that commitment, and that has altered our fellowship from time to time; but it has never once put our relationship in jeopardy.
Someone or something is always going to have ultimate control in our lives. Even those who pride themselves as always playing by their own rules got those rules from someone else. Many people who think they are in the driver's seat, are really being maneuvered by peer or media pressure. But one way of the other, a life that is not under the control of God is in a state of futile rebellion against Omnipotence. According to Philippians 2:9-11 and Romans 14:11, eventually every tongue will confess that Jesus Christ is LORD. Personally, I have chosen to confess Him here and now as the LORD of Heaven and earth...and, more importantly, the LORD of me.