change your views on set thing you read
it may sway your views from good to bad or to see some things in the book different
It’s helpful to know your purpose before you read something because a purpose can guide and focus your reading.
If you read with a clear purpose in mind, you gain more from text. It is easier to monitor your text, figure out what information is more important and make sure your reading is successful if you know your purpose before you start reading.