Likewise also St. Paul says to the Ephesians, ch. iv., "Lay aside lying, and speak truth every one with his neighbor." Truth is, that yea be yea, and nay, nay,--but hypocrisy, when any one represents himself by his outward mien as being what he is not in his thoughts. For solemn is the obligation that we should show ourselves to be what we are at heart. A Christian should so act that he could permit all men to see and know what he thinks in his heart. Let him, then, in all his walk and conduct, be anxious only to praise God, and serve his neighbor, and be afraid of no one; and let every one be in heart what he is in appearance, and not act a feigned part, whereby he shall make others gape with wonder. Furthermore, St. Peter says that we should lay aside hatred and evil speaking. Here he fitly takes up the common vices among men, in their intercourse with one another. This evil speaking is exceedingly common and injurious,--is soon done, insomuch that none of us is aware of it. Therefore he says, be on your guard, if ye already have a christian spirit, that ye may know what are the fruits of this spirit. V. 2. _And desire the sincere milk of the word, as new-born babes._ Here he institutes a comparison, and would say,--ye are like those new-born babes who seek nothing but the milk: like them, striving for the breasts and milk, so be ye also eager for the word; endeavor for it, have an appetite for it, that ye may suck in the intelligible, sincere milk. These words are, indeed, figurative; for he did not mean literal milk, or literal sucking, as he does not speak of a literal birth. But he speaks of another milk which belongs to the mind, which is spiritual, which is procured by the soul, which the heart must draw in. It must be, moreover, sincere (or unfalsified), not as the custom is, to sell false wares; since there is truly strong obligation, and great necessity, that to the new-born and young Christian, the milk should be given pure, and not corrupted. But this milk is nothing but the Gospel, which is also the same with seed, whereby we are conceived and born, as we have heard above. Yet it is also the food which nourishes us when we arrive at maturity; it is also the harness wherewith we equip and clothe ourselves,--yea, it is all these in common. But whatever is appended to it is human doctrine, whereby the word of God is falsified; therefore the Holy Spirit would have it so that every Christian shall see to it, what he sucks for milk, and shall himself learn to decide in regard to all doctrines.