I speak not this to condemn you: for I have said before, that ye are in our hearts to die and live with you.
And because ye are sons, God hath sent forth the Spirit of his Son into your hearts, crying, Abba, Father.
17 That Christ may dwell in your hearts by faith; that ye, being rooted and grounded in love,
22 Whom I have sent unto you for the same purpose, that ye might know our affairs, and that he might comfort your hearts.
And the peace of God, which passeth all understanding, shall keep your hearts and minds through Christ Jesus.
That their hearts might be comforted, being knit together in love, and unto all riches of the full assurance of understanding, to the acknowledgement of the mystery of God, and of the Father, and of Christ;
15 And let the peace of God rule in your hearts, to the which also ye are called in one body; and be ye thankful.
16 Let the word of Christ dwell in you richly in all wisdom; teaching and admonishing one another in psalms and hymns and spiritual songs, singing with grace in your hearts to the Lord.
Whom I have sent unto you for the same purpose, that he might know your estate, and comfort your hearts;
But as we were allowed of God to be put in trust with the gospel, even so we speak; not as pleasing men, but God, which trieth our hearts.
13 To the end he may stablish your hearts unblameable in holiness before God, even our Father, at the coming of our Lord Jesus Christ with all his saints.
17 Comfort your hearts, and stablish you in every good word and work.
And the Lord direct your hearts into the love of God, and into the patient waiting for Christ.
Harden not your hearts, as in the provocation, in the day of temptation in the wilderness:
… 
15 While it is said, To day if ye will hear his voice, harden not your hearts, as in the provocation.
Again, he limiteth a certain day, saying in David, To day, after so long a time; as it is said, To day if ye will hear his voice, harden not your hearts.
22 Let us draw near with a true heart in full assurance of faith, having our hearts sprinkled from an evil conscience, and our bodies washed with pure water.
14 But if ye have bitter envying and strife in your hearts, glory not, and lie not against the truth.
Ye have lived in pleasure on the earth, and been wanton; ye have nourished your hearts, as in a day of slaughter.
… 
Be ye also patient; stablish your hearts: for the coming of the Lord draweth nigh.
15 But sanctify the Lord God in your hearts: and be ready always to give an answer to every man that asketh you a reason of the hope that is in you with meekness and fear:
19 We have also a more sure word of prophecy; whereunto ye do well that ye take heed, as unto a light that shineth in a dark place, until the day dawn, and the day star arise in your hearts:
19 And hereby we know that we are of the truth, and shall assure our hearts before him.
17 For God hath put in their hearts to fulfil his will, and to agree, and give their kingdom unto the beast, until the words of God shall be fulfilled.