The Buddha’s teachings on the Four Noble Truths are sometimes compared to a physician diagnosing an illness and prescribing a treatment. The first truth tells us what the illness is, and the second truth tells us what causes the illness. The Third Noble Truth holds out hope for a cure.
The Buddha taught that through diligent practice, we can put an end to craving. Ending the hamster-wheel chase after satisfaction is enlightenment (bodhi, “awakened”). The enlightened being exists in a state called Nirvana.