The Rambam Paskens like Dovid, that a person should have extreme Simcha in serving Hashem, to the point of being somewhat “funny” with Zil'zul for our Kavod! Now we know the gravity of Simcha in Yiddishkeit! It’s Mamash Kodesh Kodashim! And don’t you dare meddle with its extreme importance!
No wonder: הָחְמִשְׂבּ ˃יֶק˄ֱא 'ה תֶא ָתְּדַבָﬠ אֹל רֶשֲׁא תַחַתּ תבא כח מז not serving Hashem B'simcha causes all the Tzaros in the world. And notice how extreme we are on Purim to get Shikor drunk, even though the Rambam says that being drunk is the opposite of Avodas Hashem! An extreme of extremes! [just like the Shita of Dovid!].
The Torah wants just the opposite! A Yid should be so deeply involved in Shaar HaBitachon and thanking Hashem to the extreme, until he “gets out of hand” with his unending Simcha.
