I remember Father's(our adorable company priest) sermon on one of his first Friday masses. It is a story of the "Deep Well".
"Why, he asks, does a well never runs out of water when we always fetch from it but suddenly becomes dry when we stop getting from it? It is because, he says, the well is simply charitable and selfless, it dies when it stops giving".
The more we give, the more we become happy, blessed and fulfilled in life. Make it a habit to be generous and of service to others. =)