"The style of Ich und Du is anything but sparse and unpretentious,
lean or economical. It represents a late flowering of romanticism
and tends to blur all contours in the twilight of suggestive but
extremely unclear language. Most of Buber’s German readers
would be quite incapable of saying what any number of passages
probably mean.
The obscurity of the book does not seem objectionable to them:
it seems palpable proof of profundity. Sloth meets with awe
in the refusal to unravel mysteries."
— Walter Kaufmann, 1970 prologue to I and Thou