Love is sacrifice.. What you sacrifice for; you love.. what you will not sacrifice for; you do not love.. Its all in degrees too.. Some people love "their CAR".. Some have levels of sacrifice.. But sacrifice is love and love is sacrifice.. Love does not have to be earned.. but sacrifice can be answered with sacrifice.. a circle of love.. Sacrifice occurs on many levels.. there is and can be an economy of sacrifice..
Those that neglect to sacrifice are unhappy people.. and are takers.. the givers love to sacrifice.. Sacrificing your personal resources and self brings joy.. Hoarding of those things brings sorrow.. and loneliness.. Thats pretty much the lessons God tried to teach the Jews in the Temple.. and as Jesus in the New Testament.. i.e. pick you're cross and follow me..