The meaning is, “Your joy will be suicidal; the wrath of the righteous Judge will be turned upon you, as the greater offender, and you will have to…

And he turn away his wrath from him.— Upon you as having sinned more deeply than your enemy in thus rejoicing at his misf…

Lest the Lord see [it], and it displease him
Who sees all things, not only external actions, but the heart, and the …

The pleasure we are inclined to take in the troubles of an enemy is forbidden.