That is, the God who is the author and bestower of peace. God dwells with those who think holy thoughts and live holy lives, and with Him comes the peace which is His (see on Phil. 4:7; Rom. 15:33).
Do.
Gr. prassō, “to practice,”“to exercise.” The apostle wanted to stimulate his converts into actual exercise of the virtues he himself had demonstrated to them.
Heard, and seen.
Just as important as formal teaching is the life of the teacher. Paul realized this, and, by God’s grace, was able so to live that he could confidently refer his readers to his own example.
Learned.
This, with “received,” may refer to what the believers gained from Paul’s formal instruction.
Those things.
Paul turns from contemplation to practice, and refers the Philippians to his own life, where the virtues of v. 8 were exemplified while he lived among them.