תּוֹרָה קסט

Through hisbodidus — in which one judges and sentences oneself as to whether one is conducting oneself properly — and one corrects one's deeds to conduct oneself according to the laws and ordinances of the Torah — the judgments are sweetened.

And through this one merits to joy — until one dances from great joy.

The primary blemish of the "bris" comes through sadness and melancholy [marah sh'chorah].

And likewise in reverse — through joy — Hashem Yisborach Himself guards one's "bris". That is — Hashem Yisborach Himself helps one to guard the holy "bris".