According to Taharat HaKodesh, if a person controls his eyes when he is in public places, Heaven considers it as if he withstood a test as difficult as Joseph's with the wife of Potiphar. Because he triumphed on that occasion and was known for his continual emphasis on modest behavior, he is known as Yoseph HaTzaddik. When we emulate his behavior, we are rewarded with the same blessings he received.
Taharat HaKodesh also offers an illuminating thought on a verse in the Song of Songs (5:12): "His eyes are as the eyes of a dove, by springs of water":
A dove has only one mate for his entire lifetime. If the men of Israel will not look at other women besides their wives, they will be likened to the Holy Supernal Dove, [i.e. G-d Himself]. In addition, they are "by springs of water," as it says (in Isaiah 58:11), "You will be like a watered garden and like a spring of water, whose waters do not fail." The allusion to water depicts wisdom and understanding.
Today: Reinforce your resolve to guard your eyes in public places and know that you will receive a special blessing from G-d for your efforts.