Irenaeus of Lyon

Shun youthful passions and pursue righteousness, faith, love, and peace, along with those who call on the Lord from a pure heart. Have nothing to do with stupid and senseless controversies; you know that they breed quarrels. And the Lord’s servant must not be quarrelsome but kindly to everyone, an apt teacher, patient, correcting opponents with gentleness. God may perhaps grant that they will repent and come to know the truth, and that they may escape from the snare of the devil, having been held captive by him to do his will.

8 I will listen to what the Lord God is saying, *
for he is speaking peace to his faithful people
and to those who turn their hearts to him.

9 Truly, his salvation is very near to those who fear him, *
that his glory may dwell in our land.

10 Mercy and truth have met together; *
righteousness and peace have kissed each other.

11 Truth shall spring up from the earth, *
and righteousness shall look down from heaven.

12 The Lord will indeed grant prosperity, *
and our land will yield its increase.

13 Righteousness shall go before him, *
and peace shall be a pathway for his feet.

Jesus said, "No one after lighting a lamp puts it in a cellar, but on the lampstand so that those who enter may see the light. Your eye is the lamp of your body. If your eye is healthy, your whole body is full of light; but if it is not healthy, your body is full of darkness. Therefore consider whether the light in you is not darkness. If then your whole body is full of light, with no part of it in darkness, it will be as full of light as when a lamp gives you light with its rays."