There is power in agreement, so who and what are you agreeing with by the power in your words?
The Israelites kept saying they were going to die in the desert, whenever they encountered a difficulty while wandering in the wilderness. They blamed Moses Ex 14:11 Then they said to Moses, “Because there were no graves in Egypt, have you taken us away to die in the wilderness ? They forgot they were in slavery for over 400 years in Egypt, and now they were free and God was trying to lead them to their destiny.
They kept saying this so much, they believed it (confession of death) more than God’s power to bring them into the promised land. God eventually came into agreement with their words and let them have what they kept declaring.
Num 26:65 For the Lord had said of them, “They shall surely die in the wilderness .
There is power in your words, so watch what you say!
Prov 18:21 The tongue has the power of life and death, and those who love it will eat its fruit. NIV