"One year, most of Adar went by and it didn't rain. They sent for Choni the Circle Maker. He prayed and the rains didn't come. He drew a circle, stood in it and said: 'Master of The World! Your children have turned to me; I swear in Your great name that I won't move from here until You have pity on Your children.' The rains came down." (Talmud, Taanit 23a)
Link:
Choni the Circle-Maker
Adar 20 is the yahrtzeit (anniversary of the passing) of Rabbi Yoel Sirkes (1560?-1640), Rabbi of Krakow and author of the Bayit Chadash ("Bach") commentary on the great Halachic work, the Arba'ah Turim.
R. Shlomo Zalman Auerbach was a renowned halachic authority who lived in Jerusalem. Many of his rulings pertain to modern technological advances as they apply to Jewish life.
Link: Contemporary Halachah
All of Torah is wrapped up in these leather straps and boxes with their finely written parchment scrolls.
Because this is the essence of every mitzvah:
To bind your heart, your mind and your action together into a single wholeness, wrapped up inextricably with the One who spoke and the world came into being.