True love is selfless. It is prepared to sacrifice.
Sadhu Vaswani
If my love is without sacrifice, it is selfish. Such a love is barter, for there is exchange of love and devotion in return for something. It is conditional love.
Ascetics and fakirs come to mitigate human suffering; to heal us and lead us on the path. They put up with criticism; they go through many worldly trials. Some of them have even become martyrs for our sake. But they have done all this with a smile and with gratitude to God. Hence sacrifice is a great virtue.
The mark of one who loves God and saints is sacrifice.
