“You have died, and your life is hidden with Christ in God” (Colossians 3:3). Our union with Christ is more than walking the path with Him. When He died we died with Him. When He rose we rose with Him. God is in Christ, Christ is in God, and we are concealed with Christ in God. We now live the hidden-with-Christ-in-God life, mystical but real. This is a transforming union that is not escapism; it teaches us how to live right in this present world.
“If then you have been raised with Christ, seek the things that are above, where Christ is, seated at the right hand of God. Set your minds on things that are above, not on things that are on earth. For you have died, and your life is hidden with Christ in God. When Christ who is your life appears, then you also will appear with him in glory.” Colossians 3:1-4 (ESV)