"But God forbid that I should glory, save in the cross of our Lord Jesus Christ, by whom the world is crucified unto me, and I unto the world" (Galatians 6:14).
Whenever people speak of "the crucial point of the issue" or "the crux of the matter," they are inadvertently acknowledging the centrality of the cross of Christ, for these words are derived from the Latin crux, meaning "a cross."
The cross of our Lord Jesus Christ is right at the very heart of Christianity and also at the very heart of the opposition to Christianity. "For the preaching of the cross is to them that perish foolishness; but unto us which are saved it is the power of God" (I Corinthians 1:18).
It was at the cross, and on the cross, that Christ defeated Satan. "Blotting out the handwriting of ordinances that was against us, which was contrary to us, and took it out of the way, nailing it to His cross; And having spoiled principalities and powers, He made a shew of them openly, triumphing over them in it" (Colossians 2:14-15).
And it is at the cross that we also must be crucified, spiritually, if Satan is to be defeated in our own lives. "I am crucified with Christ: nevertheless I live; yet not I, but Christ liveth in me" (Galatians 2:20). "And they that are Christ's have crucified the flesh with the affections and lusts" (Galatians 5:24). "Our old man is crucified with Him, that the body of sin might be destroyed, that henceforth we should not serve sin" (Romans 6:6).
Crucifixion, of course, is exceedingly painful, and therefore there is a very real "offense of the cross" (Galatians 5:11). Many Christians resist the demands on the life and the mind and the body that are entailed in such total identification with Christ. They would rather glory in earthly things. But how much better it is to glory, as Paul did, only in the cross, crucified unto the world. HMM