You are the salt of the earth; but if the salt has become tasteless, how will it be made salty again? It is good for nothing anymore, except to be thrown out and trampled underfoot by men. You are the light of the world. A city set on a hill cannot be hidden. Nor do men light a lamp, and put it under the peck-measure, but on the lamp stand; and it gives light to all who are in the house. Let your light shine before men in such a way that they may see your good works and glorify your Father who is in heaven. (Matthew 5:13-16)
We have not ceased to pray for you...
...and to ask that you may be filled with the knowledge of His will in all spiritual wisdom and understanding, so that you may walk in a manner worthy of the Lord, to please Him in all respects, bearing fruit in every good work and increasing in the knowledge of God, strengthened with all power, according to His glorious might, for the attaining of all steadfastness and patience: joyously giving thanks to the Father, who has qualified us to share in the inheritance of the saints in light. For He delivered us from the domain of darkness and transferred us to the kingdom of His beloved Son, in whom we have redemption, the forgiveness of sins. (Colossians 1:9-14
...do all things without grumbling or disputing; that you may prove yourselves to be blameless and innocent, children of God above reproach in the midst of a crooked and perverse generation, among whom you appear as lights in the world, holding fast the word of life. (Philippians 2:14-16)
...forgetting what lies behind and reaching forward to what lies ahead, (you will) press on toward the goal for the prize of the upward call of God in Christ Jesus. (Philippians 3:13-15)