Articles #3-4 are for Tisha B'Av, the major 25 hour fast from Monday sunset to Tuesday nightfall, in recollection of the destruction of the two Holy Temples in Jerusalem.
The first two articles will surprise you! They utilize scientific and mystical concepts to unlock verses from the Weekly Reading, Vaet'chanan, which, by the way, amazingly contains both the "Shema Yisrael" prayer and the Ten Commandments.