After sitting down, the Buddha told them: "Monks! I have realised the truth of the end of suffering (Nibbana), and the way to end suffering. If you learn and practice it, you will soon become enlightened. You must transcend birth and death by yourselves." At first, the five monks doubted his words and asked him many questions. But finally they began to trust him and wanted to hear his teaching. So the Buddha gave his first discourse (lesson) to the five monks at Isipatana.