Generate kindness, first towards those you like, such as parents, children or friends.
Gradually extend this feeling out
to more and more beings.
These meditations on kindness are very powerful practices.
you can even affect others.
If a meditator practices alone
in a cave, he could affect
all the beings living in that area. People and even animals could naturally start to feel kindness also.
~ The 14th Kunzig Shamar Rinpoche (Shamarpa)