Quote from : Vincent van Gogh's Drawings. An Analysis of their Production and Uses Book

Van Gogh: "It is precisely in learning to suffer without complaining,29 learning to consider pain without repugnance, that one risks vertigo a little; and yet it might be possible, yet one glimpses even a vague probability that on the other side of life we’ll glimpse justifications for pain, which seen from here sometimes takes up the whole horizon so much that it takes on the despairing proportions of a deluge.