The time is fulfilled - That is, the time for the appearance of the Messiah, the time so long foretold, has come. “The kingdom of God is at hand.” See the notes at Matthew 3:2.
Repent ye - Exercise sorrow for sins, and turn from them.
And believe the gospel - Literally, trust in the gospel, or believe the good tidings - to wit, respecting salvation. See the notes at Matthew 4:17.