The following pages are translated from an unpublished Bodleian MS. They form the first part of the introduction to an Arabic commentary on the Eisagoge of Porphyry, which the title page and the Bodleian catalogue ascribe to the well-known Arab philosopher al-Fārābī (first half of the tenth century A.D.). We know from independent sources that al-Fārābī wrote a commentary to the Eisagoge. This is evidently what we have before us, but the text dealing with the Eisagoge, which was later itself commented on by Avempace, is a different work.
The world empire of the Arabs was already an established fact considerably earlier than A.D. 700, It is generally admitted that the Arabs in the countries which they came to rule were the heirs of classical antiquity to a considerable extent. This is nowhere more evident than in philosophy and the sciences. If at first sight it seems surprising that they made more use of ancient philosophy and science than the general literature and common institutions of the Graeco-Roman world such as the theatre and the gymnasium, the reason is doubtless to be found in the abstract character of these branches, in consequence of which they did not impinge directly on the prejudices of the new rulers.