Paraphrase
17 By means of the ways mentioned above - active loving, obedience to God's command, spreading of the Gospel - love is made complete within us, giving us confidence of being found pleasing when we come to the final judgement. 18 When love is complete, no fear is necessary because no cause can be found for punishment - which is what makes us fearful. Presence of fear indicates incompleteness of love. 19 We are able to be complete in love because of God's completed love for us.
Key Verse
4:18 - this boils it down pretty nicely. When we love completely - obedient to command, willing to do what's needed even if it hurts, giving our all to see others saved - there is no reason to worry over being found wanting in the day of judgement.
New Thoughts
The perfection of love is to be like You, Lord. This is a tall order, but I am thankful that You provide us with the means. Again I pray that You would help my will to be Your will, my desire to be the doing of Your every command, my love to be as fearless as Your own. Lord, open my mouth. Give me the boldness to proclaim Your lordship, and Your great works on our behalf. I want to have no cause for concern when I stand before You. I want to be found fit to see You in Your fullness. I want to know You forever as my loving Father. Do what You need to, Father, to mold me in Your image. I am willing. Scared, but willing.