Text 16. Necessity may be absolute (‘alâ l-itlâq), as in God exists; [265] or it may be connected (mu‘allaqa) to a condition (shart).  The condition is either [1] perpetual [relative] to the existence of the substance [of the subject] (dhât), as in man is necessarily a rational body; by which we do not mean to say that man is and always will be a rational body, because this is false taken for each human individual. Rather we mean that while he exists as a substance (mâ dâma mawjûda dh-dhât) as a human, he is a rational body.  Likewise for every negative which resembles this affirmative statement. 