Romans 12:2 NLT ... Don't copy the behavior and customs of this world, but let God transform you into a new person by changing the way you think. Then you will learn to know God's will for you, which is good and pleasing and perfect.
Our mind (the thinking part of us) is where our soulish heart is. It's the part that needs to be perfected so that it's in line with our spirit man. They must be in line with each other.
It's time for God's people to grow up ... in fact, it's past time. God's purpose for our lives is that we grow up and become mature into spiritual manhood ... into the same spiritual perfection as Jesus Christ.
The meaning for the Greek word "perfecting" is "to fit or prepare fully". God's purpose is for us to be perfect, fully mature, fully equipped, and prepared to do the work that He's given the believers to do. Our work is to win souls into the Kingdom of "God, to heal the sick, and to cast out devils.
His plan for maturing is 4-fold. He wants His people to grow up into the new position of strength so that we'll be able to fearlessly face the enemy, engage him in combat, and defeat him while seizing the territory that really belongs to the Body of Christ.
Reverend Robert W. & Mary C. Butler