Ephesians 6:14 - Coke's Commentary on the Holy Bible

Having your loins girt about, &c.— It has often been observed, that the military girdle was not only an ornament, but a defence; as it hid the gaping joints of the armour, and kept them close and steady, as well as fortified the loins of those who wore it, rendering them more vigorous and fit for action. The chief difficulty here is to know, whether truth refers to the true principles of religion, or to integrity in our conduct; and how, on the latter interpretation, to keep it distinct from the breast-plate of righteousness; or, on the former, from the shield of faith: but perhaps it may rather signify some virtue of the mind, as do all the other parts of the armour enumerated; and then it must refer to that uprightness and sincerity of intention, which produces righteousness, or a holy and equitable conduct, as its proper fruit.