The love for all creation comes first, then comes the love for all of mankind, and then follows the love for the Jewish people, in which all other loves are included, since it is the destiny of the Jews to serve toward the perfection of all things. All these loves are to be expressed in practical action, by pursuing the welfare of those we are bidden to love, and to seek their advancement. But the highest of all loves is the love of God, which is love in its fullest maturing. This love is not intended for any derivative ends; when it fills the human heart, this itself spells man’s greatest happiness.
Rabbi A. I. Kook, Midot HaRiya