But if any provide not for his own, and specially for those of his own house, he hath denied the faith, and is worse than an infidel.
But - reverting to 1 Timothy 5:4, 'if any (a general proposition, therefore including the widow's children or grandchildren) provide not for his own (relations), and especially for those of his own family, he hath (practically) denied the faith.' Faith without love and its works is dead. If in any case a duty of love is plain, it is toward one's own relatives. 'Faith does not set aside, but strengthens natural duties.'
Worse than an infidel - because even an infidel is taught by nature to provide for his own relatives, and generally recognizes the duty: the Christian who does not so is worse (Matthew 5:46-47). He has less excuse with his greater light than the infidel who breaks the laws of nature. The Essenes were forbidden to relieve relatives without leave of their superiors (Josephus, Jewish Wars, 2: 8. 6).