Love has been perfected among us in this: that we may have boldness in the day of judgment; because as He is, so are we in this world (1 John 4:17).
What is this “day of judgment”? To me, that means two things: The Great Day of Judgment which will come after the Great Tribulation. God will be seated on the Great White Throne and judge the people and the nations. Those who have been born again and their sins washed away by the Blood of Jesus, will not have to be judged. All has been cleansed. The others will be judged by their works and precious few will be pardoned.
The other meaning of the words “day of judgment” indicate, to me, that here on earth there come judgments because of our words.
"But I say to you that for every idle word men may speak, they will give account of it in the day of judgment,” (Matthew 12:36).
The effect of the words we speak comes back to us, just like God’s Word goes back to Him. God’s words are good and true. Ours aren’t always like that. If we curse somebody with our words, that curse will come back on us and we will have what we said. We are therefore judged by the curse we spoke, actually causing punishment in our lives, which is what we hoped it would cause in the other person’s life.
But the more we know Jesus, the more we become like Him, the less likely a curse will ever leave our mouths. As He is good and true, we are like Him in the world, good and true!