“There are frontiers to the mind which, once crossed, afford no return.”

“Once the frontiers of horror have been crossed, one will pass from form to form beyond the human and from metamorphosis to metamorphosis to accomplish, in the anguish of an impossible return, the most terrible journey to the depths of darkness.”

“Thoughts and feelings change sometimes, as one crosses the frontiers.”

“Poetry, if it is not to be a lifeless repetition of forms, must be constantly exploring "the frontiers of the spirit." But these frontiers are not like the surveys of geographical explorers, conquered once for all and settled. The frontiers of the spirit are more like the jungle which, unless continuously kept under control, is always ready to encroach and eventually obliterate the cultivated area.”

“The mind, once stretched by a new idea, never returns to its original dimensions.”

“When a daring idea first crosses one's mind, if it is to be realized in the future it is often appealing. Then, as the time for its execution comes nearer, one begins to dread that which had once been anticipated. ”