Acts 1:3 - Matthew Poole's English Annotations on the Holy Bible

To whom, i.e. the apostles, he showed himself alive after his passion by many infallible proofs; eating, drinking, speaking, walking with them; nay, showing them his very wounds, and permitting them to be touched; God suffering Thomas's infidelity to contribute to the strengthening of our faith. Being seen of them forty days; not continually, but upon occasion as he pleased; it was so long from his resurrection to his ascension; and the same space in which God showed himself unto Moses in Mount Sinai. So long also he was pleased to stay with them, that he might more abundantly testify the truth of his humanity, and of his resurrection. And speaking of the things pertaining to the kingdom of God; either his kingdom in heaven, the church triumphant or his kingdom on earth, the church militant; what future bliss and happiness he was going to prepare, and what means they ought to use towards the obtaining of it.