1 John 4:8 - Love For One Another Is Evidence Of A Relationship With God.

Love one another: for love is of God;
and every one that loveth is born of God, and knoweth God.
He that loveth not knoweth not God; for God is love.
1 John 4:7,8 (KJV)

It is impossible to know who and what God is but not exercise His special
love to others. This is the proof of a person's walk with God.  Love, in
this passage, is absolutely not human.  The human heart is a complete
stranger to the kind of love described here. The definition for God's agape
love can be found in John 3:16, it is self-sacrificial in nature; in I
Corinthians 13, agape love is patient, kind, not jealous, doesn't brag,
isn't arrogant, doesn't act unbecomingly, doesn't seek its own, isn't
provoked, doesn't take into account a wrong suffered, doesn't rejoice in
unrighteousness but in truth, bears all things, believes all things, hopes
all things, endures all things and never, never fails. And last, agape love
has Almighty God as its source.  Love is not God, God is love. We cannot
exercise this love without a personal relationship with Jesus Christ. If you
don't see it in your life, ask God for it today and be prepared for a
radical change in your life. [IN HIS TIME: WALK WITH WISDOM]

Love is power. Intellectual and moral strength are involved in this
principle, and cannot be separated from it. The power of wealth has a
tendency to corrupt and destroy; the power of force is strong to do hurt;
but the excellence and value of pure love consist in its efficiency to do
good, and to do nothing else than good. Whatsoever is done out of pure love,
be it ever so little or contemptible in the sight of men, is wholly
fruitful; for God regards more with how much love one worketh than the
amount he doeth. Love is of God. The unconverted heart cannot originate nor
produce this plant of heavenly growth, which lives and flourishes only where
Christ reigns.
Love cannot live without action, and every act increases, strengthens, and
extends it. Love will gain the victory when argument and authority are
powerless. Love works not for profit nor reward; yet God has ordained that
great gain shall be the certain result of every labor of love. It is
diffusive in its nature and quiet in its operation, yet strong and mighty in
its purpose to overcome great evils. It is melting and transforming in its
influence, and will take hold of the lives of the sinful and affect their
hearts when every other means has proved unsuccessful..... Jesus was the
Prince of Peace. He came into the world to bring resistance and authority
into subjection to Himself. Wisdom and strength He could command, but the
means He employed with which to overcome evil were the wisdom and strength
of love.  2T135,6