Conversation so far:
What were Al-Khalil ibn Ahmad al-Farahidi's views?
Al-Farahidi's eschewing of material wealth has been noted by a number of biographers.
How did Al-Khalil ibn Ahmad al-Farahidi adopt his own views? Was Al-Khalil ibn Ahmad al-Farahidi pious?
Known for his piety and frugality

Question: What other views did he have?
Self-contained rewrite: What other views did Al-Khalil ibn Ahmad al-Farahidi have besides schewing of material wealth?