If we this day - If as is the fact; or since we are thus examined.

Examined - Questioned; if the purpose is to institute an inquiry into this case, or since it is the purpose to institute such an inquiry.

The good deed - The act of benevolence; the benefit conferred on an infirm man. He assumes that it was undeniable that the deed had been done.

To the impotent man - To this man who was infirm or lame. The man was then present, Acts 4:10, Acts 4:14. He may have been arrested with the apostles; or he may have been present as a spectator; or, as Neander supposes, he may have been summoned as a witness.

By what means - This was the real point of the inquiry. The fact that he had been made whole was not denied. The only question was whether it had been done by the authority and power of Jesus of Nazareth, as Peter declared it to be, Acts 3:6, Acts 3:16.

Acts 4:9 Parallel Commentaries

The First Blast of Tempest
'And as they spake unto the people, the priests, and the captain of the temple, and the Sadducees, came upon them, 2. Being grieved that they taught the people, and preached through Jesus the resurrection from the dead. 3. And they laid hands on them, and put them in hold unto the next day: for it was now even-tide. 4. Howbeit many of them which heard the word believed; and the number of the men was about five thousand. 5. And it came to pass on the morrow, that their rulers, and elders, and scribes, …
Alexander Maclaren—Expositions of Holy Scripture: The Acts

"And all that Believed were Together. " Acts 4:44.
"And all that believed were together." Acts 4:44. 1 Restore, O Father! to our times restore The peace which filled thine infant church of yore; Ere lust of power had sown the seeds of strife, And quenched the new-born charities of life. 2 O never more may differing judgments part From kindly sympathy a brother's heart; But linked in one, believing thousands kneel, And share with each the sacred joy they feel. 3 From soul to soul, quick as the sunbeam's ray, Let concord spread one universal …
J.G. Adams—Hymns for Christian Devotion

Ananias and Sapphira
BY REV. GEORGE MILLIGAN, M.A., D.D. One of the most striking features of the early Christian Church was what we have come to know as Christian Communism, or as the historian describes it in Acts iv, 32: "And the multitude of them that believed were of one heart and soul: and not one of them said that aught of the things which he possessed was his own; but they had all things common." It is a bright and a pleasing picture that is thus presented. Nor is it difficult to understand how such a spirit …
George Milligan—Men of the Bible; Some Lesser-Known