Semper Fidelis or Semper Fi in its common usage is the motto of the United States Marine Corp. It was adopted as the USMC motto in 1875, or 1883. The motto’s origin is unknown though it was common in Western Europe for hundreds of years before.
“Therefore, if you died with Christ from the basic principles of the world, why, as though living in the world, do you subject yourselves to regulations – “Do not touch, do not taste, do not handle…” Colossians 2:20-21.
“And He is the head of the body, the church, who is the beginning, the firstborn from the dead, that in all things He may have the preeminence. For it pleased the Father that in Him all the fullness should dwell, and by Him [Jesus] to reconcile all things to Himself [God the Father], by Him [Jesus], whether things on earth or things in heaven, having made peace through the blood of His cross.” Colossians 1:18-20.
“For as the heavens are high above the earth, so great is His mercy toward those who fear Him; as far as the east is from the west, so far has He removed our transgressions from us. As a father pities his children, so the Lord pities those who fear Him. For He knows our frame; He remembers that we are dust.” Psalm 103:11-14.
“Who shall separate us from the love of Christ?” Romans 8:35a.