Make the 10th of Tevet Fast Meaningful

I hope that these words from Sefer Hasidim (ch. 226) will make your fast more meaningful:

Know and understand, even though the Sages said fasting for a (bad) dream (cancels it) like a fire (burns) fibers of flax, they only said this with regard to one who does teshuvah together with the fast...Since one is shown a bad dream in order that he will examine his actions, because the fast is in lieu of a sin offering. Just as a sacrifice is not effective without teshuvah, as it is written "The sacrifice of the wicked is an abomination..."(Proverbs 21:27), so it is that fasting for a bad dream is not effective without teshuvah.

Have a meaningful fast, together with sincere teshuvah, and may we merit to see the Holy Temple rebuilt!