Of all of God's creation, human beings are the most unique and frustrated. Made in God's image (Genesis 1:26), we have the capacity to think, create, and question. Curious, we stretch to grasp things we can never understand with our finite minds and we grow frustrated. We then often say and think things that are just foolish—because we believe that human reason can understand divine mysteries.
However, Daniel, who was just as curious as we, didn't step on the mouse's wheel of human reason. Instead, he believed and trusted God to reveal the truth about the end of time at the appropriate time—whether he could understand it or not.