Go. be. outside.
"Let a man be naturally as blithe as a bird, he will hardly be able to bear up year after year against such a suicidal process; he will make his study a prison and his books the warders of a gaol, while nature lies outside his window calling him to health and beckoning him to joy.
He who forgets the humming of the bees among the heather, the cooing of the wood-pigeons in the forest, the song of birds in the woods, the rippling of rills among the rushes, and the sighing of the wind among the pines, needs not wonder if his heart forgets to sing and his soul grows heavy.
A day’s breathing of fresh air upon the hills, or a few hours, ramble in the beech woods? umbrageous calm, would sweep the cobwebs out of the brain of scores of our toiling ministers who are now but half alive.
A mouthful of sea air, or a stiff walk in the wind’s face, would not give grace to the soul, but it would yield oxygen to the body, which is next best.
Heaviest the heart is in a heavy air,
Ev’ry wind that rises blows away despair.
The ferns and the rabbits, the streams and the trouts, the fir trees and the squirrels, the primroses and the violets, the farm-yard, the new-mown hay, and the fragrant hops—these are the best medicine for hypochondriacs, the surest tonics for the declining, the best refreshments for the weary.
For lack of opportunity, or inclination, these great remedies are neglected, and the student becomes a self-immolated victim."(Thanks Justin Taylor)
And from Wendell Berry:
"I don't think it is enough appreciated how much an outdoor book the Bible is...It is best read and understood outdoors, and the farther outdoors the better. Or that has been my experience of it. Passages that within walls seem improbable or incredible, outdoors seem merely natural. This is because outdoors we are confronted everywhere with wonders; we see that the miraculous is not extraordinary but the common mode of existence. It is our daily bread. Whoever really has considered the lilies of the field or the birds of the air and pondered the improbability of their existence in this warm world within the cold and empty stellar distances will hardly balk at the turning of water into wine - which was, after all, a very small miracle. We forget the greater and still continuing miracle by which water (with soil and sunlight) is turned into grapes."
(Thanks Chip Baggett)