John 4:18 - Ellicott's Commentary On The Whole Bible

In that saidst thou truly. — The stroke goes deeper. It lays bare the secrets of all those years over which she thought the veil of the past had for ever been drawn. The bright days of joy and dark days of sin; the heart’s promises made and broken; the sad days of death, which five times over had robbed her of a husband; or, worse than death, the sin which had severed the sacred bonds; the shame of the present shameless life — all these are at least hidden from a stranger. But His words pierce to the inmost thoughts, and prove Him to know all the acts of her life (John 4:29). “Thou hast well said, A husband I have not. The holy name may not be given to the paramour thou now hast; with the loss of purity is linked the loss of truthfulness; the very truth thou utterest is meant to convey to Me an untruth, but to One who knows all, the words are really true; — “in that saidst thou truly.”