'Heart' in the Bible

And [I pray] that the eyes of your heart [the very center and core of your being] may be enlightened [flooded with light by the Holy Spirit], so that you will know and cherish the hope [the divine guarantee, the confident expectation] to which He has called you, the riches of His glorious inheritance in the saints (God’s people),

[and He did this] so that in the ages to come He might [clearly] show the immeasurable and unsurpassed riches of His grace in [His] kindness toward us in Christ Jesus [by providing for our redemption].

So I ask you not to lose heart at my sufferings on your behalf, for they are your glory and honor.

for their [moral] understanding is darkened and their reasoning is clouded; [they are] alienated and self-banished from the life of God [with no share in it; this is] because of the [willful] ignorance and spiritual blindness that is [deep-seated] within them, because of the hardness and insensitivity of their heart.

(for the fruit [the effect, the result] of the Light consists in all goodness and righteousness and truth),

Speak to one another in psalms and hymns and spiritual songs, [offering praise by] singing and making melody with your heart to the Lord;

Slaves, be obedient to those who are your earthly masters, with respect for authority, and with a sincere heart [seeking to please them], as [service] to Christ—