2 Corinthians 2:11

2:11 so that we may not be exploited by Satan (for we are not ignorant of his schemes).

2 Corinthians 3:2

3:2 You yourselves are our letter, written on our hearts, known and read by everyone,

2 Corinthians 4:3

4:3 But even if our gospel is veiled, it is veiled only to those who are perishing,

2 Corinthians 12:3

12:3 And I know that this man (whether in the body or apart from the body I do not know, God knows)