It is an interesting phrase for sure. I heard it recently and wondered where did it come from. The meaning of the phrase is basically for a soldier to stay at their post and not give way. Some trace this phrase all the way back 1769 by Samuel Johnson.
I believe the same phrase can be true to Christians with the core doctrines of faith. More specifically would be the centrality of Scripture. If one does not depend on Scripture everything else will follow. Ones doctrines and beliefs, if not grounded from the Bible will change and compromise will take place. Like dominoes standing on end, knock this down, your life will follow.
More than ever it would seem that we must lead with our convictions which stem from the Bible. What do we need to hold too?
- Hold to the Word of God as authoritative and Inspired (2 Tim 3:15-17).
- Hold to the Word of God that it is relevant today and is what you need (Heb 4:12).
- Hold to the Word of God that it is how God has spoken to us. This is how God has revealed himself in a special way (John 1:14; 2 Tim 3:15-17).
- Hold to the importance that the Bible leads people to faith (Rom 10:17).
King David is attributed to writing this:
The law of the Lord is perfect,
reviving the soul;
the testimony of the Lord is sure,
making wise the simple;
8 the precepts of the Lord are right,
rejoicing the heart;
the commandment of the Lord is pure,
enlightening the eyes;
9 the fear of the Lord is clean,
the rules of the Lord are true,
and righteous altogether.
10 More to be desired are they than gold,
even much fine gold;
sweeter also than honey
and drippings of the honeycomb.
11 Moreover, by them is your servant warned;
in keeping them there is great reward (Psalm 19:7-11 ESV).