But if anyone has the world’s goods and sees his brother in need, yet closes his heart against him, how does God’s love abide in him?–1 John 3:17 (ESV)
The Christian life is Christ-centered, NOT self-centered.
Here is an enlightening illustration which displays our modern feelings about “heart.”
The Greek text behind this verse (above) uses the word for “bowels” σπλάγχνα NOT “heart” καρδία The KJV renders this as “bowels of compassion” which represents the feelings to the Hebrew mind. (ISV: Whoever has earthly possessions and notices a brother in need and yet withholds his compassion from him, how can the love of God be present in him?)
In Jeremiah 31:20, “bowels” are used in “a metaphorical sense to denote the seat of emotions” (TWOT*). We use bowel metaphors like “a gut feeling” and “butterflies in my stomach.”
Again in the KJV, Colossians 3:12 is translated literally, “bowels of mercy” (where others use heart:”Put on then, as God’s chosen ones, holy and beloved, compassionate hearts…”) The New International Bible Encyclopedia relates bowels, here, to “powerful emotional forces.”
This is how we moderns understand “heart” today. “Follow your heart” epitomizes the Zeitgeist. Do you desire to divorce your spouse? Have an affair? Abandon your children? Change your gender?
“Follow your heart.”
When it comes to modern translations, many use the paraphrase “heart.”
Beginning in the mid-twentieth century, the RSV, NASB, Phillips, and the later NKJV rendered “bowels (of mercy/compassion)” as “heart.” And the English Standard Version (ESV) continued that in the twenty-first century. This misleads those with today’s mindset when we come to the actual word “heart” (kardia) in the Bible.
As noted (please be a disciple; read and learn) in the first article on Heart and Mind:
“A striking feature of the NT is the essential closeness of kardia (heart) to the concept nous, mind…”–The New International Dictionary of New Testament Theology, s.v. “heart”
All quotations of the Great Commandment in the Gospels interject the word “mind.”
The person who is awash in his feelings, following his ‘heart’ and not loving God with his whole mind, cannot “understand that the goodness of God is meant to lead [him] to repentance…because of [his] hard and impenitent heart [closed, stubborn mind]”–Romans 2:4,5.
Hebrews repeats this warning three times: “…do not harden your hearts as in the rebellion” (3:8ff). This is not an exhortation to follow your feelings. The faithful heart is one which listens to God’s voice. The heart that goes astray is the one that “has not learned my ways.” A disciple is a learner, tutored by his Master.
The hard heart is the unteachable, disobedient mind that “refused to listen to God.”
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*Theological Wordbook of the Old Testament