This is a sublime principle, and it will give sublimity to life. It is stated elsewhere in similar language, "Whatsoever ye do in word or deed, do all in the name of the Lord Jesus."
This is our high calling, to represent Christ, and act in His behalf, and in His character and spirit, under all circumstances and toward all men. "What would Jesus do?" is a simple question which will settle every difficulty, and always settle it on the side of love.
But we cannot answer this question rightly without having Jesus Himself in our hearts. We cannot act Christ. This is too grave a matter for acting. We must have Christ, and simply be natural and true to the life within us, and that life will act itself out.
Oh, how easy it is to love every one, and see nothing but loveliness when our heart is filled with Christ, and how every difficulty melts away and every one we meet seems clothed with the Spirit within us when we are filled with the Holy Ghost!