A human being is part of the whole, called by us the "universe," a part limited in time and space. One experiences oneself, one's thoughts and feelings, as something separated from the rest, a kind of optical delusion of one's consciousness. This delusion is a kind of prison for us, restricting us to our personal desires and to affection for a few persons nearest to us. Our task must be to free ourselves from this prison by widening our circle of compassion to embrace all living creatures and the Oneness of nature in its beauty.
If we just worry about the big picture, we are powerless. So my secret is to start right away doing whatever little work I can do. I try to give joy to one person in the morning, and remove the suffering of one person in the afternoon. If you and your friends do not despise the small work, a million people will remove a lot of suffering.