The Apostle Paul
Ephesians 6:14BSB·traditional attribution

Stand firm then, with the belt of truth buckled around your waist, with the breastplate of righteousness arrayed,

John Calvin Reformed @genevareformer

14. Stand therefore. Now follows a description of the arms which they were enjoined to wear. We must not, however, inquire very minutely into the meaning of each word; for an allusion to military customs is all that was intended. Nothing can be more idle than the extraordinary pains which some have taken to discover the reason why righteousness is made a breastplate, instead of a girdle.

Matthew Henry Presbyterian @wholebiblehenry

Here is a general exhortation to constancy in our Christian course, and to encourage in our Christian warfare. Is not our life a warfare? It is so; for we struggle with the common calamities of human life. Is not our religion much more a warfare?

Commenting on Ephesians 6:10-18

John Gill Reformed Baptist @doctorgill

Stand therefore,.... Keep your ground, do not desert the army, the church of Christ, nor his cause; continue in the station in which you are placed, keep your post, be upon your watch, stand upon your guard: having your loins girt about with truth; by which is meant the Gospel, and the several doctrines of it; see Eph 1:13; and to have the loins girt...