II Corinthians 6:7

Paul listed the many afflictions, hardships, and sufferings he endured as a minister of God, yet rejoiced in them, urging the Corinthians in turn to open their hearts wide to him as he had to them. He warned them not to be unequally yoked with unbelievers, asking what fellowship light has with darkness, and called them to separate themselves and be cleansed from all filthiness of flesh and spirit.