1:8 Evidently Daniel took the initiative with this decision, and his three friends followed his lead. His decision was not to remain morally pure but to remain ceremonially pure. Ceremonial purity was something that concerned only the most faithful Jews. Jews who were careful to remain ceremonially pure would have been equally careful to preserve their moral and ethical purity. Daniel wanted to please the Lord in every respect, not just in the most important moral aspects of his life (cf. 1 Cor. 10:40). Undoubtedly the meat and wine that they refused had been offered to the Babylonian gods (Marduk [or Bel], Nebo, Ishtar, etc.) since it came from the king's table (cf. 2 Kings 25:29). These young men faced a situation common to every modern Christian youth. They could be a part of the crowd and submit to peer pressure to get ahead. Alternatively they could do what they knew would please their God though it might involve persecution and cost them career opportunities.
"The command of the king, that the young men should be fed with the food and wine from the king's table, was to Daniel and his friends a test of their fidelity to the Lord and to His law, like that to which Joseph was subjected in Egypt, corresponding to the circumstances in which he was placed, of his fidelity to God (Gen. xxxix. 7 f.)."37
". . . the only way we can advance in the truth is by maintaining a good conscience [cf. 1 Tim. 1:19; 1 Pet. 3:16; et al.]. Allow one thing in your life unjudged that you know to be contrary to the word of God, or that you fear is not in line with God's will for you, and you will soon find your spiritual eyes become darkened, your spiritual susceptibilities deadened, and no real progress made in your soul, but rather a steady decline. But where there is faithfulness in separation from that which is opposed to the mind of God; where His word is allowed to sit in judgment on all your ways, you will learn that the path of the just is as a shining light, which shineth brighter and brighter unto the perfect day.' The Word will illumine each step before you as you take the one already pointed out."38
1:9-13 Daniel must have established a good relationship with the officials in direct authority over him, especially the overseer (steward, v. 11). He received a favorable response (Heb. hesed, loyal love, and rahamim, compassion) when he proposed a ten-day dietary test. But it was Yahweh who moved the overseer's heart (cf. 1 Kings 8:50; Ps. 106:46), another indication of God's sovereignty. Notice that Daniel did not rebel against the restrictions that his elders placed upon him. Instead he courteously requested permission to abstain, and then having received an encouraging response he offered a positive alternative course of action.
Daniel proposed a vegetarian diet. Omitting meat and wine from one's diet does not normally result in obviously better health. Perhaps Daniel was relying on God to cause him and his friends to look better at the end of the test period miraculously. Another possibility is that the youths may have been served such rich food that they could reasonably expect to look and feel better if they abstained.