Does Joshua teach us to accept help irrespective of the source?

[tailfins]

2:1And Joshua the son of Nun sent out of Shittim two men to spy secretly, saying, Go view the land, even Jericho. And they went, and came into an harlot's house, named Rahab, and lodged there.

6:17And the city shall be accursed, even it, and all that are therein, to the Lord: only Rahab the harlot shall live, she and all that are with her in the house, because she hid the messengers that we sent.

Not only was Rahab a harlot, but she was likely a pagan, as was much of the city of Jericho. However, God led them to dwell in the house of Rahab.

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