Isaiah 58: 7-10
Kindness towards others brings light to a darkened world.

1 Corinthians 2: 1-5
Paul relies on the power of God rather than any show of oratory or philosophy in order to convey his knowledge of the crucified Christ.

Matthew 5: 13-16
The disciples of Jesus are to be salt and light to the earth, so that their good works may bring praise to our heavenly Father.