By what authority...?
Yes, there is power in our confession, but yet in terms of the LEVEL of power in that word is based on the AUTHORITY behind that word.
Matthew 21:23
"By what authority are you doing these things?" they asked. "And who gave you this authority?"
Example #1:
When the boss of a certain company sets the salary of the employees, no matter how much the employees or other people confess that they should be paid a different amount, it is not going to change the salary they are taking because the word was given by a higher authority.
Example #2:
You went to a designer's store and saw a vase. It was created to look like a vase and act like a vase. no matter how many times you can confess to the vase that it's a pen, it will still remain as a vase because the INITAL purpose of its creation was to be a vase and it is in the authority of the designer that created it as a vase.
Same goes, no matter what others say about you, it is not going to change the fact that you are the child of God and that you are created for the very purpose God have called you to. No matter what people say and confess about you, it is not going to change God's call in your life and God's perspective of you! You are who God created you to be, not what others say you are.
Others can say whatever they want about the word of God, but it is not gonna change the word of God at all because the word of God is the highest form of authority!
The power of confessed words can change situations only when it is spoken out of the right authority. If the word of God is the highest form of authority, then why would you choose to confess out of your own will or your own confidence? By what authority are you confessing it with?
Yet, to be able to be confessing out of the word of God and with the authority of God, requires us to first KNOW the word of God! Knowledge is power, for you cannot confess what you do not know and you will not know what you do not spend time to learn or study.