若隐若现如影随形
[ruò yĭn ruò xiàn rú yĭng suí xíng]
'Sometimes hidden, sometimes visible; Always following like shadows' conveys elusiveness and constancy. Such a description often alludes to abstract concepts like fate, destiny, memory, or persistent yet unpredictable occurrences. It hints at mysterious elements in the background or side-by-side with oneself, shaping events without full visibility, akin to the shadow following us.