Better the day, better the deed.

The proverb-like phrasing links moral action to the quality of the moment: when the “day” (circumstance, opportunity, or one’s disposition) is better, the “deed” (the action taken) will be better too. Read this way, it suggests that conduct is shaped by conditions—social, emotional, or material—and that improving the conditions of life can improve what people do. It can also be taken more personally as a call to seize auspicious moments: choose the right time and mindset, and your work will be sounder. The balanced, alliterative structure makes it memorable and gives it the feel of a maxim rather than a line tied to a single dramatic situation.