Today, the 10th of Tevet, is the 10th day of the 10th month (from Nisan, the beginning of months) and the 100th (102) day of the new year!
10 Tevet = 421, the 15th inspirational number (152 plus 142) and the value of the verse, "And Noah found favor in the eyes of God."
In our prayers today we compare the fast of 10 Tevet to the deluge in the time of Noah. The future flood will be one of knowledge of God.
The average value of the 7 words of the verse we quote today, "And the waters decreased continually until the tenth month" = 207, "light."
The decreasing waters in Noah's time were a sign that the flood was over. Now, the increasing waters of knowledge are a sign of redemption.