Please turn to Hebrews 13, verse 5. Now the road ahead may be rough and times of stress may be intense, but God will not give up on us unless we rebel and quit. He will bring us into His Kingdom.
So the power of God's Spirit enables us to boldly say, I will not fear.
We can broaden that principle and realize that what God is saying to us with that is He will not leave us nor forsake us until He has finished with us in whatever He has in mind for us to do His work. And so it is the same principle there as we have as a guarantee ourselves.