One in a Million

The Rema’s cryptic comment, the final one in Ohr HaChaim, has sparked centuries of contemplation. He states, “Some say that one is obligated to increase in joy and feasting on the 14th of Adar I; however, this is not our practice. Nevertheless, one should increase their feasting slightly to satisfy the stringent opinions. ‘But the good-hearted has a continual feast’ (Proverbs 15:15).”
The first part of the comment is clear enough. In leap years, there are two months of Adar. Purim is celebrated in the second Adar. Should there be any celebration on the 14th of Adar Rishon? It is a machlokes. The Rema, therefore, advises some increase in feasting. However, why did the Rema add the verse from Mishlei: “But the good-hearted has a continual feast”?
The Aruch HaShulchan explains that perhaps the reader is hesitant to follow the Rema’s advice. He is reluctant to engage in meaningless partying. After all, some opinions state there is no reason for any increase in feasting during Adar Rishon. Therefore, the Rema is informing us that the main pathway towards avodas Hashem is through simcha. The individual should intend that his increase in feasting is to ensure that his avodas HaShem that day is done with joy. Therefore, even if it turns out that the halacha follows the opinion that there is no particular reason to increase feasting on Adar Rishon, he still accomplished something. Now his regular, daily avodas Hashem will be with simcha! It is considered a mitzvah celebration, as long as that is his intent.