How are we “hidden with Christ in God”? Let’s explore this thought.
For you died, and your life is hidden with Christ in God. When Christ who is our life appears, then you also will appear with Him in glory. (Col 3:3-4 NKJV)
As believers in and followers of Jesus Christ, we have been set free from the law of sin and death. (Rom 8:2) We are set free from the power of sin. (Rom 6:7) Since we are ‘dead’ to sin—or spiritually separated from it through salvation in Jesus—our lives are encompassed or contained in Jesus Christ.
All of this simply means that we are in union with Jesus, our Savior. We are one with Him.
On that day [when that time comes] you will know for yourselves that I am in My Father, and you are in Me, and I am in you. (Joh 14:20 AMP)
I have been crucified with Christ. It is no longer I who live, but Christ who lives in me. And the life I now live in the flesh I live by faith in the Son of God, who loved me and gave himself for me. (Gal 2:20 ESV)
As you can see from the two verses shown above, it is clear that we are forever in union with Jesus, and securely enfolded by our loving heavenly Father.
After a little while, the world no longer is going to see Me, but you are going to see Me; because I live, you also will live. (Joh 14:19 NASB)
Being in union with Christ means that the past, present, and future aspects of our life are now and forever tied up and remain in union with Christ, and it began at the Cross when we died with Him. The condition of our lives may appear to contradict this truth, when difficulties rain down upon us, but no matter what life throws at us our union with Christ is 100% secure.
(Source: https://dailyverse.knowing-jesus.com/colossians-3-3)
All of this reassures us to realize that we are safe and secure in Jesus. He is our rock, our fortress, deliverer, strength, shield and our stronghold. (Ps 18:2) May God bless your day!