Sacrifice means not that you gave
Sacrifice means not that you gave money to the church, or did some poor feeding or helped some student through class in his education. That is not sacrifice. Sacrifice, in my understanding, means never thinking of yourself. Unless you can stop thinking of yourself in any situation, at any time, anywhere, there is no sacrifice.
Taken from the book "HeartSpeak 2010 (1st edn., 2011)", Chapter "Change the Future for Humanity", pg. 243, by Revered Chariji