Perfect love results in boldness in judgement 1 John 4:17a
Love is perfected in us when we keep His word 1 John 2:5
Love is perfected in us when we love one another 1 John 4:12
Because when we are growing in keeping His word and loving one another, we are being conformed to the image of Christ 1 John 4:17b
And as we are conformed to the image of Christ, we should grow in boldness that we will not be one of those who cry ‘Lord, Lord’ only to hear ‘depart from Me’ Matthew 7:21-23

Perfect love cast out fear of torment 1 John 4:18
Is this saying that a Christian should not fear hell? Not at all
3 reasons, according to Jesus, that a Christian should have a healthy fear of hell
A Christian should have a healthy fear of letting that which causes him to sin be the reason he is cast into hell Matthew 18:8-9
A Christian should have a healthy fear of letting the fear of man be the reason he is cast into hell Luke 12:4-5
A Christian should have a healthy fear of not abiding in Christ be the reason he is cast into hell John 15:6
Yes, a true Christian will never perish John 10:27-30
But a true Christian will consider the goodness and severity of God Romans 11:19-22