Book of 1 John Chapter 3 Vs. 11

 Love One Another

Verses 11-24: John elaborates on the love life of genuine believers. For those who are truly born again, love is an indispensable characteristic. The new nature of seed, verse 9, that God imparts not only exhibits holiness but also love as a habitual characteristic (John 13:35; Romans 5:5; 1 Thes. 4:9). Those who practice love give proof of the new birth and those who do not, have never been born again.

I John 3:11 "For this is the message that ye heard from the beginning, that we should love one another."

is the message... Greek: angelia, proclamation; commandment; order (1Jhn. 3:11; 1:5).

that (ἵνα)

The purport and aim of the message. Some of the more subtle phases of John's thought cannot be apprehended without a careful study of this often-recurring conjunction. It is still claimed by some grammarians that it is used to mark, not only design and end, but also result. But it may fairly be claimed that its predominant sense is intent, purpose, purport, or object. Hence that, as representing ἵνα, is to be taken in the sense of to the end or intent that; in order that. Here the use of the word is very subtle and suggestive, as well as beautiful. No man hath greater love than this love, which, in its original conception, was intended and designed to reach to the extent of sacrificing life for a friend. Christ, therefore, here gives us more than a mere abstract comparison and more than a merely human gauge of love. He measures love according to its divine, original, far-reaching intent. from the beginning... Compare 1Jhn. 1:1; 2:7, 2:13-14, 2:24; 3:8; 2Jhn. 1:5-6. Since the beginning of gospel proclamation, love has been a central theme of Christianity. John emphasizes what they heard from the beginning to emphasize that the false teachers were preventing that which God, through the apostles, proclaimed.

from the beginning (ἀπ' ἀρχῆς)

The phrase occurs twice in the Gospel (John 8:44; 15:27); nine times in the First Epistle, and twice in the Second. It is used both absolutely (John 3:8; 2:13, 2:14), and relatively (John 15:27; 1Jhn. 2:24). It is here contrasted with in the beginning (John 1:1). The difference is that by the words in the beginning, the writer places himself at the initial point of creation, and, looking back into eternity, describes that which was already in existence when creation began. The Word was in the beginning. In the words from the beginning, the writer looks back to the initial point of time and describes what has been in existence from that point onward. Thus, in the beginning characterizes the absolute divine Word as He was before the foundation of the world and at the foundation of the world. From the beginning characterizes His development in time. Note the absence of the article both here and in John 1:1. Not the beginning as a definite, concrete fact, but as apprehended by man; that to which we look as beginning.

love one another... Mat. 22:39; John 13:34-35; 15:12. This phrase highlights the habit of love displayed by those possessing the new nature.

Love is not merely an optional duty for someone claiming to be a Christian, but proof positive that one truly has been born again (John 15:12; 1Pet. 1:22-23).

It is one of the 2 things Jesus said covered all the law and prophets, to love others. Love of God and love of neighbors covers it all. We may not like what they are doing, but we must love them.

John here made it plain that his admonitions were directed to Christians. This is the message you Christians have heard from the beginning: We Christians should love one another.