This week's d'var Torah is sponsored by Golda Brown in honour of the yahrzeit of her son, Moshe Chanoch Brown Krakowsky, z"l. May his memory be for a blessing.
desecration of G-d's name
Of all possible wrongdoings, only one does not allow for the possibility of teshuva, repentance. Causing a chilul Hashem, a desecration of G-d's name, is not something for which one can just say sorry, promise never to do it again, and move on. The lingering effects of desecrating G-d's name do not go away just because one is sorry. Thus, Maimonides (Teshuva 1:4) writes that it is only upon death that repentance might be obtained. If chilul Hashem is so severe, it follows that kiddush Hashem, the sanctification of G-d's name, would be the greatest of mitzvot.