Practice of the Christian Life
Witness
The believer has to glorify God as the salt of the earth and the light of the world [262]; he testifies to the Gospel to men, holding out the word of life and doing what is right [263]. God urges the believer to behave blamelessly [264], with gentleness and wisdom [265], with no grumbling or arguing [266], with respect and in obedience to the authority [267].