We can wax eloquently about the effects of the cross... and why Jesus had to die rather than wave a magic wand or overlook sin. We can support or debunk predestination, and there's the various methods used for interpreting Revelation . . . and so on.
But this verse, talking about a dream Joseph was having to explain Mary's condition, the Bible simply says "She will have a son, and you are to name in Jesus - for He will save people from their sins.
There it is. All in one nice little verse. Thanks for sharing Joseph.