2 Corinthians 2:4; 2 Corinthians 3:2; 2 Corinthians 4:6; 2 Corinthians 6:11; 2 Corinthians 7:3; 2 Corinthians 8:16; 2 Corinthians 9:7

4 For out of much affliction and anguish of heart I wrote unto you with many tears; not that ye should be grieved , but that ye might know the love which I have more abundantly unto you.
2 Ye are our epistle written in our hearts, known and read of all men:
6 For God, who commanded the light to shine out of darkness , hath shined in our hearts, to give the light of the knowledge of the glory of God in the face of Jesus Christ.
11 O ye Corinthians, our mouth is open unto you, our heart is enlarged .
3 I speak not this to condemn you: for I have said before , that ye are in our hearts to die and live with you.
16 But thanks be to God, which put the same earnest care into the heart of Titus for you.
7 Every man according as he purposeth in his heart, so let him give; not grudgingly , or of necessity: for God loveth a cheerful giver.