His youth passed like a dream.
Meaning: His younger days went by quickly and now seem like a distant memory.
Choice of Words: Youth means the time of life when someone is young. Passed means to move from one place or condition to another. Like means similar to or resembling. Dream means a series of thoughts, images, and sensations occurring in a person's mind during sleep. Together, they convey the idea of his youth disappearing quickly and leaving a lasting impression.
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Related Expressions