Who hath also sealed us, and given the earnest of the Spirit in our hearts.
2 Corinthians 3:2
Ye are our epistle written in our hearts, known and read of all men:
2 Corinthians 4:6
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.
2 Corinthians 7:3
I speak not this to condemn you: for I have said before, that ye are in our hearts to die and live with you.