God is faithful, by whom ye were called unto the fellowship of his Son Jesus Christ our Lord. God is faithful - The faithfulness of God is a favourite expression among the ancient Jews; and by it they properly understand the integrity of God in preserving whatever is entrusted to him. And they suppose that in this sense the fidelity of man may illustrate the fidelity of God, in reference to which they tell the two following stories. "Rabbi Phineas, the son of Jair, dwelt in a certain city, whither some men came who had two measures of barley, which they desired him to preserve for them. They afterwards forgot their barley and went away. Rabbi Phineas each year sowed the barley, reaped, thrashed, and laid it up in his granary. When seven years had elapsed the men returned, and desired to have the barley with which they had entrusted him. Rabbi Phineas recollected them, and said, 'Come and take your treasure,' i.e. the barley they had left, with all that it had produced for seven years. Thus, from the faithfulness of man ye may know the faithfulness of God."
"Rabbi Simeon, the son of Shetach, bought an ass from some Edomites, at whose neck his disciples saw a diamond hanging; they said unto him, Rabbi, the blessing of the Lord maketh rich, Proverbs 10:22. But he answered: The ass I have bought, but the diamond I have not bought; therefore he returned the diamond to the Edomites. Thus, from the fidelity of man ye may know the fidelity of God." This was an instance of rare honesty, not to be paralleled among the Jews of the present day, and probably among few Gentiles. Whatever is committed to the keeping of God he will most carefully preserve; for he is faithful.
Unto the fellowship, etc. - Εις κοινωνιαν, Into the communion or participation of Christ, in the graces of his Spirit and the glories of his future kingdom. God will continue to uphold and save you, if you entrust your bodies and souls to him. But can it be said that God will keep what is either not entrusted to him; or, after being entrusted, is taken away?