It's like when two people are meeting in order to see if they should get married. They MUST use their sechel to decide if it's the right thing. But once they are married - אוי ואבוי woe unto them if they are still deciding. They must let go of their logic and completely immerse themselves in the euphoric experience we call love.
On Purim we accepted the Torah once again - this time out of love [הדור קבלוה בימי אחשורוש - מפרש רש"י מאהבת הנס]. We just have to feel the ecstasy of being in love with Hakadosh Baruch Hu. No logic.
עד דלא ידע
[ספר החודש אשר נהפך עמ' לח]
