Kosher Tzitzit Strings: A Matter of Intent
The Torah tells us to make tzitzits for ourselves – v'asu lahem tzitzis (Bamidbar 15:38). Based on these words, the Talmudic Sages and later the Shulchan Aruch ruled that tzitzit strings must be made with intent (lishma), i.e. when making the strings one must have intent that they eventually be used for the mitzvah...