Here begins in this 10th chapter of Daniel and running right through to the end of the book, the most detailed and far-reaching prophetic vision in the entire Bible. There is no other vision as extensive as this, with so much fine print, as it were, or small detail as this.
We note the prophet’s concern and feeling in his devotions. It is described as mourning, and there ought to be a measure of mourning in our devotions too: for the lack of progress, for the state of our society, for the small number of conversions in so many churches around the country. It is a day of small things and we long for the name of Christ to be lifted up and glorified everywhere. So it means we should have times of great seriousness in our devotions, as well as joy and praise and gratitude.
Daniel denied himself his normal food and bodily comfort in sympathy with his spirit of mourning, and in order to give attention to prayer. He ate, but no pleasant food. He did it to show to God that he was in earnest, for it was a prayer in which he humbled himself before God, and he needed to be consistent with the spirit of that prayer, and to show he desired the answer to prayer more than his own comfort. Intercession for him was very serious. God won’t bless unless a person is serious.
Some commentators say rather foolish things about this. They hold it against Daniel that he hadn't returned. They challenge him. They say, he should have returned with the other Jews. But when we see the way in which God deals with Daniel, and his great kindness to him, and how he privileges him with these unprecedented revelations, that is a very foolish thing to assume. It was obviously God who held Daniel back. There was more for him to do in the capital (the effective ruling capital still of the empire) rather than to go off to Jerusalem with the younger people.