Definition
Fickleness is the natural instability of human feeling and attention. Moods rise and fall with the day, opinions shift with the latest input, and loyalty or enthusiasm can fade as quickly as it appeared. What a person feels strongly in one moment may be gone the next.
This is not a flaw in particular people so much as a feature of the species. Emotions are reactive and weather-like, and most behavior follows them rather than steady principle.
Why it matters
How it works
Feelings are responses to immediate stimuli — a comment, a result, a level of energy or hunger — and they pass as the stimulus passes. Because people tend to treat the current emotion as the whole truth, they over-trust it, mistaking a temporary state for a settled judgment.
The practical response is twofold. With others, build in margin: assume that enthusiasm and agreement can evaporate, and verify rather than rely on a single warm moment. With oneself, create distance between feeling and action — letting a strong mood settle before committing to anything important, and anchoring long-term aims in structure and routine rather than in the unreliable weather of emotion.