The attributes of God are love and mercy; the attribute of
Satan is hate. Therefore, he who is merciful and kind to his fellowmen is
manifesting the divine attribute, and he who is hating and hostile toward a
fellow creature is satanic. God is absolute love, even as Jesus Christ has
declared, and Satan is utter hatred. Wherever love is witnessed, know that
there is a manifestation of God's mercy; whenever you meet hatred and enmity,
know that these are the evidences and attributes of Satan.
-‘Abdu’l-Baha (Excerpt from a talk given on 21 April 1912 in Washington D.C.; ‘Promulgation of
Universal Peace’)