Wisdom is knowing that all things have been reconciled through the Cross. Not just people, but all things.
"And through Him having made peace through the blood of His cross, it pleased the Father to reconcile all things to Himself through Him, whether the things on earth or the things in Heaven." (Colossians 1:20).
Reconcile is a powerful word. Strongs Concordance calls it "to bring back a former state of harmony." It is defined "to repair, to put back into working order, making peace between two opposing views or groups." Vines Bible Dictionary defines it "to change from enmity to friendship."
The Cross of Jesus Christ takes all of our "enemies," whether they be people, demons, circumstances, sickness, poverty, everything, and changes them into a "friend." In this sense "friend" means something to our advantage and to God's advantage. This is Wisdom! Christ crucified! (1 Co. 1:23-24).
2 Corinthians 5:18 says, "All this is from God, who reconciled us to himself through Christ and gave us the ministry of reconciliation:"
This is our ministry here on earth, to take all the enemies of our lives, dip them into the blood and Cross of Jesus Christ, and turn them into friends. I can tell you by the Word of God and by my own experience, that this is true, it works, if you believe beyond ordinary believing as Abraham did.
"Yet he [Abraham] did not waver through unbelief regarding the promise of God, but was strengthened in his faith and gave glory to God" (Romans 5:20).