You happily give Facebook terabytes of structured data about yourself, content with the implicit tradeoff that Facebook is going to give you a social service that makes your life better.

If we do not lay out ourselves in the service of mankind, whom should we serve?

Consciously or unconsciously, everyone of us does render some service or another. If we cultivate the habit of doing this service deliberately, our desire for service will steadily grow stronger, and it will make not only for our own happiness, but that of the world at large.

How can I be useful, of what service can I be? There is something inside me, what can it be?

Life's most urgent question is: What are you doing for others?

Teach this triple truth to all: A generous heart, kind speech, and a life of service and compassion are the things which renew humanity.