And we - We who are here present. Paul and Barnabas.
Declare unto you glad tidings - We preach the gospel the good news. To a Jew, nothing could be more grateful intelligence than that the Messiah had come; to a sinner convinced of his sins nothing can be more cheering than to hear of a Saviour.
The promise ... - The promise here refers to all that had been spoken in the Old Testament respecting the advent, sufferings, death, and resurrection of Christ.