John Calvin Commentary Philippians 4:9

"The things which ye both learned and received and heard and saw in me, these things do: and the God of peace shall be with you." — Philippians 4:9 (ASV)

What things you have learned, and received, and heard. By this accumulation of terms, he intimates that he was assiduous in inculcating these things. “This was my doctrine—my instruction—my discourse among you.” Hypocrites, on the other hand, insisted upon nothing but ceremonies. Now, it was a dishonorable thing to abandon the holy instruction, which they had wholly imbibed, and with which they had been thoroughly imbued.

You have seen in me. Now, the main thing in a public speaker should be that he speaks not merely with his mouth but by his life, and procures authority for his doctrine by rectitude of life. Paul, accordingly, procures authority for his exhortation on this ground: that he had, by his life no less than by his mouth, been a leader and master of virtues.

And the God of peace. He had spoken of the peace of God; he now more particularly confirms what he had said by promising that God himself, the Author of peace, will be with them. For the presence of God brings us every kind of blessing: as though he had said that they would feel that God was present with them to make all things turn out well and prosperously, provided they apply themselves to pious and holy actions.