Universal Science:An Introduction to Islamic Metaphysics

Philosophy is the foundation of all sciences. It is the universal science
(ʿilm-i kullī). Without philosophy no other science can be established
(banā kard)…Philosophy is the ontology of any reality (ḥaqīqat). For ex-
ample, the reality (ḥaqīqat) of man. If you put philosophy to one side, you
have put man aside. Because man is a rational and perceiving animal…
the perceiver of ‘reality’. Āyatullāh Mahdī Ḥāʾirī Yazdī (d. 1420 ah/1999)1………………..

Hairi Yazdi, Universal Science, An Introduction To Islamic Metaphysics (trans. Cooper)