"A person who has no taste for the enjoyment of Christ will not go to heaven. 'If anyone has no love for the Lord, let him be accursed' (1 Cor. 16:22). 'Whoever loves father or mother more than me is not worthy of me, and whoever loves son or daughter more than me is not worthy of me' (Matt. 10:37). 'Though you have not seen him, you love him. Though you do not now see him, you believe in him and rejoice with joy that is inexpressible and filled with glory (1 Pet. 1:8). Loving Jesus, not just 'deciding' for him or 'being committed to him' or affirming all the right doctrines about him, is the mark of a true child of God. Jesus said, 'If God were your Father, you would love me.' (John  8:42).

John Piper, When I Don't Desire God