Albert Barnes Commentary Psalms 33:5

"He loveth righteousness and justice: The earth is full of the lovingkindness of Jehovah." — Psalms 33:5 (ASV)

He loveth righteousness — See Psalms 11:7.

And judgment — justice.

The earth is full of the goodness of the Lord — Margin, "mercy." So the Hebrew. That is, his mercy or goodness is manifest everywhere. Every part of the earth bears witness that he is good.