Our Gemara discusses the famous dictum תָּדִיר וְשֶׁאֵינוֹ תָּדִיר — תָּדִיר קוֹדֵם when a frequent practice and an infrequent practice coincide, the frequent practice takes precedence over the infrequent practice. This is learned out from a verse regarding the Tamid offering that precedes the Musaf offerings (Zevachim 89a).  A similar principle is stated that the more holy choice takes precedence over the less holy, see Mishna Horayos 3:6 and commentaries. An interesting question comes up in regard to a conflict between one observance that is more holy, while the other is more frequent, which takes precedence (Zevachim 90b).  The Gemara itself leaves the question unanswered.  Therefore, the Rambam (Laws of Daily Sacrifice 9:2) rules that one can choose either approach, although interestingly the Bartenura says that one should choose the frequent choice first (Mishna Zevachim 10:6), and commentaries (Tosafos Yom Tov, Rashash) discuss how Bartenura can rule on a matter that the Gemara leaves unsolved.  

From a psychological perspective, we can translate this into a disagreement of two values in the following manner: There is the value of habit and consistency versus the value of Inspiration and passion. Consistency is represented in the notion that the frequent takes precedence. Inspiration and passion is represented in the notion that the holier takes precedence. Perhaps, ultimately, the Gemara did not rule because there are times in life for one or the other is more important. Sometimes one should choose the mitzvah or act that one is most consistent and familiar with, and perhaps at other times, one should choose the mitzvah that one is more inspired by at the moment.

Translations Courtesy of Sefaria, except when, sometimes, I disagree with the translation

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