Charles H. Spurgeon on Psalms 44:21

Shall not God search this out? etc. Are there such variety of trials appointed to examine the sincerity of men's graces? How great a vanity, then, is hypocrisy! and to how little purpose do men endeavour to conceal and hide it! We say, murder will out; and we may as confidently affirm, hypocrisy will out. When Rebekah had laid the plot to disguise her son Jacob, and by personating his brother to get the blessing, Jacob thus objects against it: "My father peradventure will feel me, and I shall seem to him as a deceiver, and I shall bring a curse upon me and not a blessing." As if he should say, But what if my father detect the cheat? How, then, shall I look him in the face? How shall I escape a curse? After the same manner every upright soul scares itself from the way of hypocrisy. If I dissemble, and pretend to be what I am not, my Father will find me out. There is no darkness nor shadow of death that can conceal the hypocrite; but out it will come at last, let him use all the art he can to hide it...If men's works be not good, it is impossible they should be hid long. A gilded piece of brass may pass from hand to hand a little while, but the touchstone will discover the base metal; and if that does not, the fire will. John Flavel.