Hebrews 13:2

Forgetful. Apparently many tended to become absorbed in their own affairs to the extent that they were not taking the personal interest in their fellow believers that they should have. As the church grows in numbers there is increasing danger that the same condition will prevail today. Our neighbor is anyone in need of friendship and hospitality.

Entertain strangers. Inns were not common, and strangers were often considered with suspicion. Unless individuals took an interest in wayfaring men they might often have no place in which to lodge. In ancient times hospitality required that provision be made for strangers. The same need may no longer exist in the same degree today, inasmuch as facilities for the accommodation of travelers are generally ample. Nevertheless the principle remains, and Christians are to seek ways and means of expressing hospitality, in keeping with the needs of modern times.

Entertained angels. Such was the privilege of Abraham (Gen. 18:1-8), of Lot (Gen. 19:1-3), of Gideon (Judges 6:11-20), and of Manoah (Judges 13:2-4, 9-21). Faithfulness in ministering to the needs of strangers will come up for consideration in the final judgment (see Matt. 25:35).

Unawares. That is, at first, when the strangers were invited in.