The way that the Buddhist tradition defines and approaches compassion and love is somewhat different than the ways these terms are conventionally understood. The notion of love as it is frequently talked about has some approximation to the notion of compassion, but it is more limited when compared to the Buddhist understanding. Compassion in the Buddhist tradition transcends all limitations, whether they be limitations of colour, creed or even the distinction between humans and animals. It is for this reason that we describe compassion in the Buddhist tradition as immeasurable—the objects for whom we cultivate compassion are immeasurable in their number and their diversity. Another reason we describe this compassion as immeasurable is that the merit generated through such compassion is infinite and limitless.
Depicted from "Guide to the Four Preliminary Practices 1 - Part 4" April, 2015, Vancouver, Canada