Life is but a dream / Life is only a dream: 인생은 꿈일 뿐이다 (word for word translation). But that translation is a little too flat and boring. People are more likely to say: - 인생은 그냥 꿈같은 거야 [것이야]: Life is just like a dream. - 사는 건 그냥 한 편의 꿈이야: To live is just one dream episode you have. And there is a very widely used set phrase 일장춘몽 (한바탕의 봄꿈 - a spell of a spring dream, one hell of a spring dream) - 인생은 일장춘몽이다: Life is an empty dream / Life is a fleeting dream. - 겪고 보니 지난 일이 가위 일장춘몽 같더라: Looking back, what has gone by is indeed like a spring dream.