Commentaries:
Jamieson, Fausset, and Brown
Besides the argument (I John 4:20) from the common feeling of men, he here adds a stronger one from God's express commandment (Matthew 22:39). He who loves, will do what the object of his love wishes.
he who loveth God—he who wishes to be regarded by God as loving Him.
Other Jamieson, Fausset, and Brown entries containing 1 John 4:21:
2 Corinthians 1:5
1 John 4:7
1 John 5:1
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