Is the world just an illusion?

The world is not an illusion. What is then meant by the assertion that — ‘the world is an illusion’? Why does the Seers have to say that, “Jagat is mithya (the world is an illusion)”?

It is because there are a lot of people who do not take (for example) a sofa as merely ‘a sofa’.

The sofa is ten thousand things to you, and those ten thousand things keep changing depending upon your…