(30) Understandest thou what thou readest?--The Greek play upon the word for understand (Ginoskein) and read (Anaginoskein) cannot well be produced in English, but is worth noting as parallel to a like play in the well-known saying of the Emperor Julian (Anegnon; egnon; kategnon)--"I read; I understood; I condemned."

Verse 30. - Ran for ran thither, A.V.; reading-Isaiah the prophet for read the prophet Esaias, A.V. and T.R. Heard him. He was reading aloud. In Hebrew, the word for "to read" (קָרָא) means "to call," "to proclaim aloud." Hence the keri, that which is read, as distinguished from the cethib, that which is written. Reading Isaiah the prophet. The same providence which sent Philip to meet him in the desert doubtless directed his reading to the fifty-third chapter of the great evangelical prophet.

8:26-40 Philip was directed to go to a desert. Sometimes God opens a door of opportunity to his ministers in very unlikely places. We should study to do good to those we come into company with by travelling. We should not be so shy of all strangers as some affect to be. As to those of whom we know nothing else, we know this, that they have souls. It is wisdom for men of business to redeem time for holy duties; to fill up every minute with something which will turn to a good account. In reading the word of God, we should often pause, to inquire of whom and of what the sacred writers spake; but especially our thoughts should be employed about the Redeemer. The Ethiopian was convinced by the teaching of the Holy Spirit, of the exact fulfilment of the Scripture, was made to understand the nature of the Messiah's kingdom and salvation, and desired to be numbered among the disciples of Christ. Those who seek the truth, and employ their time in searching the Scriptures, will be sure to reap advantages. The avowal of the Ethiopian must be understood as expressing simple reliance on Christ for salvation, and unreserved devotion to Him. Let us not be satisfied till we get faith, as the Ethiopian did, by diligent study of the Holy Scriptures, and the teaching of the Spirit of God; let us not be satisfied till we get it fixed as a principle in our hearts. As soon as he was baptized, the Spirit of God took Philip from him, so that he saw him no more; but this tended to confirm his faith. When the inquirer after salvation becomes acquainted with Jesus and his gospel, he will go on his way rejoicing, and will fill up his station in society, and discharge his duties, from other motives, and in another manner than heretofore. Though baptized in the name of the Father, Son, and Holy Ghost, with water, it is not enough without the baptism of the Holy Ghost. Lord, grant this to every one of us; then shall we go on our way rejoicing.And Philip ran thither to him,.... Being very ready to obey the divine order, and hoping he might be an instrument of doing some good, which might issue in the glory of God, and the welfare of men:

and heard him read the prophet Esaias; that is, "the Book of Isaiah the Prophet"; as before; and so the Ethiopic and Arabic versions read here, as there: he read it out, with a clear and distinct voice, so that Philip could hear him; and this he did, partly through reverence to the word of God, and partly to fix his attention to it the more, that he might the better understand and remember it, and also for delight and pleasure: it is very likely, that it was the Book of Isaiah in the Hebrew tongue in which he was reading, and which language he might understand, though he might be at a loss about the sense of the prophet:

and said, understandest thou what thou readest? meaning not the language, but the sense; for overhearing him, he perceived it was a prophecy in Isaiah he was reading; which was not so easy to be understood as laws and precepts are, which command this, and forbid that; whereas prophecies were more abstruse, and regarded things to come.