Answer: He wanted to create a place where he could practice his religion freely.
Explanation: He belonged to a religious group of Quakers, they were of a view that man-made rules were not fair and everyone was forced to follow them instead of following their own will and inner insight of the events happening around them. Thus, he wanted to acquire that land in New World (later named as Pennsylvania) to practice their religion freely and considered that place a safe haven for Quakers community. Religious tolerance was a prominent feature of his colony.