Colossians 3:3 – The Unknown Line.
The Spirit of God testifies to and confirms the simple, but almighty, security of the life that "is hidden with Christ in God." Paul continually brought this out in his New Testament letters. We talk as if living a sanctified life were the most uncertain and insecure thing we could do. Yet it is the most secure thing possible, because it has Almighty God in and behind it. The most dangerous and unsure thing is to try to live without God. For one who is born again, it is easier to live in a right-standing relationship with God than it is to go wrong, provided we heed God's warnings and "walk in the light."
When we think of being delivered from sin, being "filled with the Spirit", and walking in the light," we picture the peak of a great mountain. We visualize it as very high and wonderful. However, when we do get there through God's grace, we find it is not a mountain peak at all, but a plateau with lots of room to live and to grow.
When you really see Jesus, I defy you to doubt Him, If you see Him when He says, "Let not your heart be troubled", I defy you to worry. It is virtually impossible to doubt when He is there.
Every time you are in personal contact with Jesus, His words are real to you, a peace which brings an unconstrained confidence and covers you completely, from the top of your head to the soles of your feet, your life is hidden with Christ in God, and the peace of Jesus Christ that cannot be disturbed has been imparted to you.