The world is a drama staged in a dream. So here you have the Hindu, the Vedic notions of maya. The world is an illusion. His followers will eventually be known as Sikhs, and the word Sikh comes from the Sanskrit word for to learn or learning, and it's related to the word for student. And even in modern Sanskrit-derived languages like Hindi, you have words like Sikhna, which means to learn. Guru Nanak dies in the early 16th century, and you can see by this point, the Mughals have taken control of northern India. And before his death, he names Guru Angad, who is not his son, as his successor.