Verse 23. And this is his commandment. His commandment, by way of eminence; the leading, principal thing which he enjoins on us; the commandment which lies at the foundation of all true obedience.

That we should believe on the name of his Son Jesus Christ. See Barnes "Mr 16:16".

Comp. Joh 16:1; Ac 16:31.

And love one another, etc. This follows from the other, and hence they are mentioned as together constituting his commandment. See Barnes "Joh 13:36".

{e} "this is his commandment" De 18:15-19; Joh 14:1