1 John 3:11
11For this is the message which you heard from the beginning, that we should love one another—
This is the message from the beginning: love one another. The particular named in v. 10 is the original message, not a new extra.
The same old commandment as 2:7–8. Love is the church’s first word, still in force.
Calvin: the faithful had been so taught from the beginning; the statement ought not to have appeared new. This righteousness alone is approved: if we love one another.
Holiness does not consist in fictitious works. The devil reigns where hatred prevails. The message is love.