4:17-19 For the time has come for judgment to begin from the household of God. And, if it begins from us, what will be the end of those who disobey the good news which comes from God? And, if the righteous man is scarcely saved, where will the impious man and the sinner appear? So, then, let those who suffer in accordance with the will of God, entrust their souls to him who is a Creator on whom you can rely, and continue to do right.
As Peter saw it, it was all the more necessary for the Christian to do right because judgment was about to begin.
It was to begin with the household of God. Ezekiel hears the voice of God proclaiming judgment upon his people, "Begin at my sanctuary" ( Ezekiel 9:6 ). Where the privilege has been greatest, there the judgment will be sternest.
If judgment is to fall upon the Church of God, what will be the fate of those who have been utterly disobedient to the invitation and command of God? Peter confirms his appeal with a quotation from Proverbs 11:31 : "If the righteous is requited on earth, how much more the wicked and the sinner!"
Finally, Peter exhorts his people to continue to do good and, whatever happens to them to entrust their lives to God, the Creator on whom they can rely. The word he uses for to entrust is paratithesthai ( Greek #3908 ), which is the technical word for depositing money with a trusted friend. In the ancient days there were no banks and few really safe places in which to deposit money. So, before a man went on a journey, he often left his money in the safe-keeping of a friend. Such a trust was regarded as one of the most sacred things in life. The friend was absolutely bound by all honour and all religion to return the money intact.
Herodotus (6: 86) has a story about such a trust. A certain Milesian came to Sparta, for he had heard of the strict honour of the Spartans, and entrusted his money to a certain Glaucus. He said that in due time his sons would reclaim the money and would bring tokens which would establish their identity beyond doubt. The time passed and the sons came. Glaucus treacherously said that he had no recollection of any money being entrusted to him and said that he wished four months to think about it. The Milesians departed sad and sorry. Glaucus consulted the gods as to what he ought to do, and they warned him that he must return the money. He did so, but before long he died and all his family followed him, and in the time of Herodotus there was not a single member of his family left alive because the gods were angry that he had even contemplated breaking the trust reposed in him. Even to think of evading such a trust was a mortal sin.
If a man entrusts himself to God, God will not fail him. If such a trust is sacred to men, how much more is it sacred to God? This is the very word used by Jesus, when he says "Father, into thy hands I commit my spirit" ( Luke 23:46 ). Jesus unhesitatingly entrusted his life to God, certain that he would not fail him--and so may we. The old advice is still good advice--trust in God and do the right.
-Barclay's Daily Study Bible (NT)