2 Corinthians 6:14-18

Do not be bound together with unbelievers; for what partnership have righteousness and lawlessness, or what fellowship has light with darkness? …

2 Corinthians 6:11-13
Our mouth has spoken freely to you, O Corinthians, our heart is opened wide. You are not restrained by us, but you are restrained in your own affections. Now in a like exchange — I speak as to children — open wide to us also.

2 Corinthians 6:4-10
…but in everything commending ourselves as servants of God, in much endurance, in afflictions, in hardships, in distresses, in beatings, in imprisonments, in tumults, in labors, in sleeplessness, in hunger, in purity, in knowledge, in patience, in kindness, in the Holy Spirit, in genuine love, in the word of truth, in the power of God; by the weapons of righteousness for the right hand and the left, by glory and dishonor, by evil report and good report; regarded as deceivers and yet true; as unknown yet well-known, as dying yet behold, we live; as punished yet not put to death, as sorrowful yet always rejoicing, as poor yet making many rich, as having nothing yet possessing all things.

2 Corinthians 6:1-3
And working together with Him, we also urge you not to receive the grace of God in vain — for He says, “AT THE ACCEPTABLE TIME I LISTENED TO YOU, AND ON THE DAY OF SALVATION I HELPED YOU.” Behold, now is “THE ACCEPTABLE TIME,” behold, now is “THE DAY OF SALVATION” — giving no cause for offense in anything, so that the ministry will not be discredited…”