"Let your conversation be without covetousness; and be content with such things as ye have: for he hath said, I will never leave thee, nor forsake thee. So that we may boldly say, The Lord is my helper, and I will not fear what man shall do unto me" (Hebrews 13:5-6, KJV).
Confession in faith is making proclamations in accordance with what God have said in His word. The power of such is harness by believing in the power of the Word of God.