Christianity teaches that love is the foundation of relationships between people and with God. It aims to restore harmony horizontally between individuals through sacrifice and love for one another, opening the path also to restore the vertical relationship with God based on giving and receiving with Him. Loving one another as disciples of Christ is the sign that shows people we follow Him.

2. The Lord God said,
“It is not good for
the man to be
alone. I will make
a helper suitable
for him.”
Genesis 2:18

3. Christianity is a religion of love. It strives
through love and sacrifice to open the path to
restore the horizontal relationships of give
and take between people in the love of
Christ. On this horizontal foundation of love,
the way is opened to restore our vertical
relationship of give and take with God.
Divine Principle, Part 1, Chapter 1 Section 2.2

4. By this everyone
will know that you
are my disciples, if
you have love for
one another.
John 13:35