Not defile himself. There were several reasons why a pious Jew would avoid eating of the royal food: (1) the Babylonians, like other pagan nations, ate unclean meats; (2) the beasts had not been properly killed according to Levitical law (Lev. 17:14, 15); (3) a portion of the animals eaten was first offered as a sacrifice to pagan gods (see Acts 15:29); (4) the use of luxurious and unhealthful food and drink was contrary to strict principles of temperance; (5) for Daniel and his friends there was the added desire to avoid a flesh-food diet. The Hebrew youth determined to do nothing that would interfere with physical, mental, and spiritual development.