Be sure that it will make you abnormally sensitive to little things; irritable where once you were amiable; glum where once you went whistling about your work and your play.

It is the crystallizer of character, the acid test of friendship, the final seal set upon enmity.

It will betray your little, hidden weaknesses, cut and polish your undiscovered virtues, reveal you in all your glory or your vileness to your companions in exile--if so be you have any.
If you would test the soul of a friend, take him into the wilderness and rub elbows with him for five months! One of three things will surely happen: You will hate each other afterward with that enlightened hatred which is seasoned with contempt; you will emerge with the contempt tinged with a pitying toleration, or you will be close, unquestioning friends to the last six feet of earth--and beyond.

All these things will cabin fever do, and more.

It has committed murder, many's the time.