Deuteronomy 13:6

Thy brother, the son of thy mother ; thy full brother, allied to thee by the closest fraternal tie. The wife of thy Bosom; the object of thy tenderest affection, Whom it is thine to protect and cherish (cf. Deuteronomy 28:54 , Deuteronomy 28:56 ; Micah 7:5 ). Thy friend, which is as thine own soul ; i . e . whom thou lovest as thyself. The word translated "friend" ( רֵעַ , for רֵעֶהֹ ) is from a verb which signifies to delight in, and conveys primarily the idea not merely of a companion, but of a friend in whom one delights; and the definition of true friendship is the loving another as one's self (Aristot; 'Eth. Nic.,' Deuteronomy 9:5 ). As commonly used, however, the word designates any one with whom one has any dealing or intercourse; and so our Lord expounds it ( Luke 10:29 , etc.). Secretly . If the temptation was in private, and so known only to thyself.