Ben Sira 34:4

4 What is unreal can no more produce something real than what is dirty can produce something clean.

Ben Sira 34:4 In-Context

2 A person who pays any attention at all to dreams is like someone who tries to catch shadows or chase the wind.

3 What you see in a dream is no more real than the reflection of your face in a mirror.

4 What is unreal can no more produce something real than what is dirty can produce something clean.

5 Dreams, divination, and omens are all nonsense. You see in them only what you want to see.

6 Unless the Most High has sent you the dream, pay no attention to it.