It is the characteristic of great poems that they will yield of their sense in due proportion to the hasty and the deliberate reader. To the practical they will be common sense, and to the wise wisdom; as either the traveler may wet his lips, or an army may fill its water-casks at a full stream.
Henry David ThoreauSome poems are for holidays only. They are polished and sweet, but it is the sweetness of sugar, and not such as toil gives to sour bread. The breath with which the poet utters his verse must be that by which he lives.
Henry David Thoreau