Solitude is dangerous to reason, without being favourable to virtue: pleasures of some sort are necessary to the intellectual as to the corporeal hea… - Samuel Johnson

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Solitude is dangerous to reason, without being favourable to virtue: pleasures of some sort are necessary to the intellectual as to the corporeal health; and those who resist gaiety, will be likely for the most part to fall a sacrifice to appetite; for the solicitations of sense are always at hand, and a dram to a vacant and solitary person is a speedy and seducing relief.

Remember that the solitary mind is certainly luxurious, probably superstitious, and possibly mad: the mind stagnates for want of employment, grows morbid, and is extinguished like a candle in foul air.