The Daily Mitzvah schedule runs parallel to the daily study of 3 chapters of Maimonides' 14-volume code. There are instances when the Mitzvah is repeated a few days consecutively while the exploration of the same Mitzvah continues in the in-depth track.
Daily Mitzvah (Rambam)
Day 82: Negative Commandment 356; Positive Commandment 216
Important Message Regarding This Lesson
Negative Commandment 356 (Digest)
Remarrying a Divorced Wife Who Remarried in the Interim
"Her first husband who sent her away may not marry her again"—Deuteronomy 24:4.
It is forbidden for a man to remarry a woman he divorced if she has remarried [and subsequently been divorced again or widowed] in the interim.
Positive Commandment 216 (Digest)
Levirate Marriage
"Her husband's brother shall be intimate with her"—Deuteronomy 25:5.
The brother of a married man who dies childless is commanded to marry his widowed sister-in-law. [See Positive Commandment 217 for the mechanism by which this mitzvah can be bypassed.]
A person should really know the pathways of Heaven, but actually this is not crucial. One needs only the main thing - to help another wholeheartedly, with sensitivity, to take pleasure in doing a kindness to another.
