And this is His commandment: We should believe in the name of His Son Jesus Christ [i.e., the person of Christ], and love one another, just as He has commanded us to do.
And this is the [greatest] commandment [See Matt. 2:37-38] we have received from Him: [It requires] that the person who [claims to] love God should also love his brother.
So, the large number of believers was united in heart and soul [i.e., mind and spirit] and not one of them said that anything he owned [really] belonged to him, but they shared all things in common.
[However], the person who loves his brother continues to live in [harmony with] the light [of God’s truth], and such a person is not the cause of others stumbling [over his example].
Now to summarize: All of you should think alike. Be sympathetically understanding [toward one another]. Be loving toward [your] brothers [and sisters]. Be tender-hearted and humble-minded.
[Jer. 31:33f], “The Lord says, this is the Agreement I will make with them [i.e., with my people] after those days. I will put my laws in their hearts and I will write them on their minds.” Then He said,
But the Helper, that is, the Holy Spirit, whom the Father will send in my name [i.e., by my authority] will teach you everything. And He will remind you of everything that I [have] said to you.