Our sages have called Shmiras Habris "Yesod", which means "Foundation". This week is the week of Yesod in the Seffira counting, and it is therefore an especially auspicious time to work on the area of Shmiras Habris. As we often repeat on GuardYourEyes, the Yesod - i.e. "foundation" - of a building is underground and no one sees it, yet it holds up the entire building! Shmiras Habris is the hidden part of a Jew, it's the real you. If the foundation of a Jew is weak, his whole spiritual structure is in danger of collapse. And conversely - if the foundation is strong, one can build on it a sky-scraper of spiritual achievement!