'Messengers' in the Bible

When the messengers of John had left, He began to speak to the crowds about John, “What did you go out into the wilderness to see? A reed shaken by the wind?

and He sent messengers on ahead of Him, and they went and entered a village of the Samaritans to make arrangements for Him.

As for Titus, he is my partner and fellow worker among you; as for our brethren, they are messengers of the churches, a glory to Christ.

In the same way, was not Rahab the harlot also justified by works when she received the messengers and sent them out by another way?