(13) My sister.--True literally, as Sarai was Terah's daughter (Genesis 20:12), but absolutely false, as it implied that she was wholly his sister, and therefore not his wife.

12:10-20 There is no state on earth free from trials, nor any character free from blemishes. There was famine in Canaan, the glory of all lands, and unbelief, with the evils it ever brings, in Abram the father of the faithful. Perfect happiness and perfect purity dwell only in heaven. Abram, when he must for a time quit Canaan, goes to Egypt, that he might not seem to look back, and meaning to tarry there no longer than needful. There Abram dissembled his relation to Sarai, equivocated, and taught his wife and his attendants to do so too. He concealed a truth, so as in effect to deny it, and exposed thereby both his wife and the Egyptians to sin. The grace Abram was most noted for, was faith; yet he thus fell through unbelief and distrust of the Divine providence, even after God had appeared to him twice. Alas, what will become of weak faith, when strong faith is thus shaken! If God did not deliver us, many a time, out of straits and distresses which we bring ourselves into, by our own sin and folly, we should be ruined. He deals not with us according to our deserts. Those are happy chastisements that hinder us in a sinful way, and bring us to our duty, particularly to the duty of restoring what we have wrongfully taken or kept. Pharaoh's reproof of Abram was very just: What is this that thou hast done? How unbecoming a wise and good man! If those who profess religion, do that which is unfair and deceptive, especially if they say that which borders upon a lie, they must expect to hear of it; and they have reason to thank those who will tell them of it. The sending away was kind. Pharaoh was so far from any design to kill Abram, as he feared, that he took particular care of him. We often perplex ourselves with fears which are altogether groundless. Many a time we fear where no fear is. Pharaoh charged his men not to hurt Abram in any thing. It is not enough for those in authority, that they do not hurt themselves; they must keep their servants and those about them from doing hurt.Say, I pray thee, that thou art my sister,.... Which though it was not putting a direct lie into her mouth, she being his sister in some sense, as appears from Genesis 20:12 yet it was done to conceal truth, and to deceive the Egyptians, and tended to endanger his wife's chastity, as well as showed great timorousness in him, and distrust of the divine care and protection of him; and upon the whole it must be criminal in him, and shows that the best of men are liable to sin, and the strongest believer to fall, and that a saint may fail in the exercise of that grace for which he is most eminent, as Abram was for his faith, and yet fell into unbelief, and through that into other sins; this he said to his wife, and desired her to say on occasion, when she found it necessary:

that it may be well with me for thy sake; his life spared, as follows:

and my soul shall live because of thee; his life be safe and secure for her sake, being reckoned her brother, whereas he feared it would be in the utmost danger should it be known she was his wife.