'Heartfelt' in the Bible

Heartfelt thanks be to the God and Father of our Lord Jesus Christ--the Father who is full of compassion and the God who gives all comfort.

Receive him therefore with heartfelt Christian joy, and hold in honour men like him;

Therefore, God’s chosen ones, holy and loved, put on heartfelt compassion, kindness, humility, gentleness, and patience,

Be miserable and grieve and weep [over your sin]. Let your [foolish] laughter be turned to mourning and your [reckless] joy to gloom.

Therefore, confess your sins to one another [your false steps, your offenses], and pray for one another, that you may be healed and restored. The heartfelt and persistent prayer of a righteous man (believer) can accomplish much [when put into action and made effective by God—it is dynamic and can have tremendous power].