'Hearts' in the Bible

Glory in His holy name;Let the hearts of those who seek the Lord rejoice.

“As for you, Solomon my son, know the God of your father [have personal knowledge of Him, be acquainted with, and understand Him; appreciate, heed, and cherish Him] and serve Him with a blameless heart and a willing mind; for the Lord searches all hearts and minds, and understands every intent and inclination of the thoughts. If you seek Him [inquiring for and of Him and requiring Him as your first and vital necessity] He will let you find Him; but if you abandon (turn away from) Him, He will reject you forever.

O Lord, God of Abraham, Isaac, and Israel, our fathers, keep forever such purposes and thoughts in the minds of Your people, and direct their hearts toward You;