And you will seek Me and find Me, when you search for Me with all your heart. (Jeremiah 29:13)
Our heart represents the vital innermost center of our total personality, especially with reference to intuition, feeling and emotion as contrasted to the head which is the center of the intellect. God instructs us to search for Him from the level of our heart because we find Him as we experience His great love for us. God desires to be the center of our existence as we surrender our totality to Him.