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But wine is not needed to enable him to escape.
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The wine would put him in a state in which he would no longer be himself, aware that life is full of pain, that the young die, the old suffer, and that just to think about life brings sorrow and despair. Keats longs for a draught of wine which would take him out of himself and allow him to join his existence with that of the bird.
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The bird's happiness is conveyed in its singing. Envy of the imagined happiness of the nightingale is not responsible for his condition rather, it is a reaction to the happiness he has experienced through sharing in the happiness of the nightingale. Keats is in a state of uncomfortable drowsiness.
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