Philippians 4:8-9

v8: To do what is right, we must think about what is right - what is true, honourable, just, pure, lovely, commendable, excellence, praiseworthy.  All these qualities are found in the Lord Jesus Christ.

v9: The Philippians were to follows Paul's example because "what they saw in him was the same as what they heard from him." He was imitating Christ, so they should imitate him by doing what they had heard from him and seen in him.  "We give great force to what we say to others when we can appeal to what they have seen in us."