And I set my face unto the Lord God - Probably the meaning is, that he turned his face toward Jerusalem, the place where God had dwelt; the place of his holy abode on earth. See the notes at Daniel 6:10. The language, however, would not be inappropriate to denote prayer without such a supposition. We turn to one whom we address, and so prayer may be described by “setting the face toward God.” The essential idea here is, that he engaged in a set and formal prayer; he engaged in earnest devotion. He evidently set apart a time for this, for he prepared himself by fasting, and by putting on sackcloth and ashes.
To seek by prayer and supplications - To seek his favor; to pray that he would accomplish his purposes. The words “prayer and supplications,” which are often found united, would seem to denote “earnest” prayer, or prayer when mercy was implored - the notion of “mercy” or “favor” implored entering into the meaning of the Hebrew word rendered “supplications.”
With fasting - In view of the desolations of the city and temple; the calamities that had come upon the people; their sins, etc.; and in order also that the mind might be prepared for earnest and fervent prayer. The occasion was one of great importance, and it was proper that the mind should be prepared for it by fasting. It was the purpose of Daniel to humble himself before God, and to recal the sins of the nation for which they now suffered, and fasting was an appropriate means of doing that.
And sackcloth - Sackcloth was a coarse kind of cloth, usually made of hair, and employed for the purpose of making sacks, bags, etc. As it was dark, and coarse, and rough, it was regarded as a proper badge of mourning and humiliation, and was worn as such usually by passing or girding it around the loins. See the notes at Isaiah 3:24; Job 16:15.
And ashes - It was customary to cast ashes on the head in a time of great grief and sorrow. The principles on which this was done seem to have been,
(a) that the external appearance should correspond with the state of the mind and the heart, and
(b) that such external circumstances would have a tendency to produce a state of heart corresponding to them - or would produce true humiliation and repentance for sin.
Compare the notes at Job 2:8. The practical truth taught in this verse, in connection with the preceding, is, that the fact that a thing is certainly predicted, and that God means to accomplish it, is an encouragement to prayer, and will lead to prayer. We could have no encouragement to pray except in the purposes and promises of God, for we have no power ourselves to accomplish the things for which we pray, and all must depend on his will. When that will is known it is the very thing to encourage us in our approaches to him, and is all the assurance that we need to induce us to pray.