The spirit of childhood is a spirit of simplicity and joy that goes together with the greatest intelligence and the most advanced knowledge. Here more than anywhere else the law of contrasts holds: one must be great to be secure enough to be truly childlike -- just as one must be strong to be infinitely gentle, and wise in order to permit oneself to be foolish. Spiritual childhood is a matter of trust and self-surrender into God's hands.
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.