Touching not religion with levity, nor deep things when thou art wearied.
Thy mind is freshened by morning air, grapple with science and philosophy;
Noon hath unnerved thy thoughts, dream for a while on fictions:
Grey evening sobereth thy spirit, walk thou then with worshippers:
But reason shall dig deepest in the night, and fancy fly most free.
O books, ye monuments of mind, concrete wisdom of the wisest;
Sweet solaces of daily life; proofs and results of immortality;
Trees yielding all fruits, whose leaves are for the healing of the nations;
Groves of knowledge, where all may eat, nor fear a flaming sword:
Gentle comrades, kind advisers; friends, comforts, treasures: