Who knows the spirit of the sons of men, which goes upward, and the spirit of the animal, which goes down to the earth?
Ecclesiastes 3:21
Surrounding context
3:20 All go to one place: all are from the dust, and all return to dust.
3:21 Who knows the spirit of the sons of men, which goes upward, and the spirit of the animal, which goes down to the earth?
3:22 So I perceived that nothing is better than that a man should rejoice in his own works, for that is his heritage. For who can bring him to see what will happen after him?