God issues an invitation to two kinds of people: Those who are thirsty and broke and know they can't pay for what they need, and those who think they are self-sufficient but are still not satisfied. His offer is to "Come! Buy! Eat! Drink! Live!" by finding our joy and satisfaction in God alone. And when we delight in him, we will increase our joy by calling others to join us, by forsaking the empty promises of sin, and by nourishing ourselves with his Word. Then our hope in God will be evident to all, and he will be glorified in our everlasting song of joy!