In So Far As The Soul Is

The More We Desire For That Which Is Superfluous, The More We Meet With Difficulties; Our Strength And Possessions Are Spent In Unnecessary Things, And Are Wanting When Required For That Which Is Necessary.

Let Nothing Which Can Be Treated By Diet Be Treated By Other Means.

It Is Thus Necessary To Examine All Things According To Their Essence, To Infer From Every Species Such True And Well Established Propositions As May Assist Us In The Solution Of Metaphysical Problems.

A Truth Does Not Become Greater By Repetition.

The Mutakallemim... Apply The Term Non-existence Only To Absolute Non-existence, And Not To Absence Of Properties. A Property And The Absence Of That Property Are Considered By Them As Two Opposites, They Treat, E.g. , Blindness And Sight, Death And Life, In The Same Way As Heat And Cold. Therefore They Say, Without Any Qualification, Non-existence Does Not Require Any Agent, An Agent Is Required When Something Is Produced.