...and you are complete through your union with Christ. He is the Lord over every ruler and authority in the universe.
Colossians 2:10 NLT
You are complete by being in union with him. This means that if you are not in union with Christ, you are not a complete person, you cannot reach the best of your potential, you are not your full person and you are not hundred percent. When you allow your life to come in union with him, by living your life like your Lord, your life comes in union and then you are completed in him. You get to one hundred percent because you are living your life in him. To be at your best, you have to be in union with Christ. This Christ has been made Lord over everything. He is above all, "and God has put all things under the authority of Christ, and he gave him this authority for the benefit of the church."(Ephesians 1:19-22 NLT)
If Christ is seated above all powers, all creatures, animate and inanimate, then we are reigning together, "for he raised us from the dead along with Christ, and we are seated with him in the heavenly realms--all because we are one with Christ Jesus." (Ephesians 2:6 NLT)
We are in charge together. When you are made complete, you reach your full potential. Your full potential is to do what Jesus is doing. You are to be seated with him. Therefore, if we are in union with our Lord, it makes you to be in charge of all that is in his charge.
When a man and woman are joined together in matrimony, they come into union with each other. All the estate of the man becomes the woman's also. She assumed charge of what the husband has charge. Therefore, living him by conforming your life to his, bring you in union/matrimony with your Lord and whatever he has, becomes yours. So if he is in charge of all then being seated with him confer on you enormous authority.
For instance, just as Jesus would send angels on errands, if you were in union with Christ you can send them on errands. Angels have been given to us who have pledged allegiance to Christ as ministering servants (Hebrews 1:14). They are to be at your disposal. So take charge of your world. You can send angels on errands.
However, what makes your command to be obeyed and makes your lordship to be respected is because you are seated with him and you are in union with him.
We learnt more about this when a Roman officer came and pleaded with Jesus when he arrived in Capernaum, for the healing of his servant.
Then the officer said, "Lord, I am not worthy to have you come into my home. Just say the word from where you are, and my servant will be healed! I know, because I am under the authority of my superior officers and I have authority over my soldiers. I only need to say, `Go,' and they go, or `Come,' and they come. And if I say to my slaves, `Do this or that,' they do it."
Matthew 8:8-9 NLT
What made the Roman officer's authority over others to be effective was because he was under authority. What will make your lordship in this world to be tangible and manifest is to be under the lordship of Christ. You demonstrate this by living your life like him.
Do you submit to him? Do you still have some areas God cannot address? Submit and see God work it out for your good, even when it seems difficult. Do you have his permission in your plans and intentions?
You can only have one lord at a time: "No one can serve two masters. For you will hate one and love the other, or be devoted to one and despise the other. You cannot serve both God and money." (Matthew 6:24 NLT)
If you are influenced by money, he cannot be your Lord, "but we know that there is only one God, the Father, who created everything, and we exist for him. And there is only one Lord, Jesus Christ, through whom God made everything and through whom we have been given life."(1 Corinthians 8:6 NLT)
You are permitted to have only one lord at a time. He is either Lord over everything or he is Lord over nothing. That little portion of your life you are withholding from his lordship makes him Lord over nothing in your life.