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It is easy for the student to feel that with all his labour he is collecting only a few leaves, many of them now torn or decayed, from the countless foliage of the Tree of Tales, with which the Forest of Days is carpeted. It seems vain to add to the litter. Who can design a new leaf? The patterns from bud to unfolding, and the colours from spring to autumn were all discovered by men long ago. But that is not true. The seed of the tree can be replanted in almost any soil, even in one so smoke-ridden (as Lang said) as that of England. Spring is, of course, not really less beautiful because we have seen or heard of other like events: like events, never from world's beginning to world's end the same event. Each leaf, of oak and ash and thorn, is a unique embodiment of the pattern, and for some this very year may be the embodiment, the first ever seen and recognized, though oaks have put forth leaves for countless generations of men.
We do not, or need not, despair of drawing because all lines must be either curved or straight, nor of painting because there are only three 'primary' colours. We may indeed be older now, in so far as we are heirs in enjoyment or in practice of many generations of ancestors in the arts. In this inheritance of wealth there may be a danger of boredom or of anxiety to be original, and that may lead to a distaste for fine drawing, delicate pattern, and 'pretty' colours, or else to mere manipulation and over-elaboration of old material, clever and heartless. But the true road of escape from such weariness is not to be found in the willfully awkward, clumsy, or misshapen, not in making all things dark or unremittingly violent; nor in the mixing of colours on through subtlety to drabness, and the fantastical complication of shapes to the point of silliness and on towards delirium. Before we reach such states we need recovery. We should look at green again, and be startled anew (but not blinded) by blue and yellow and red. We should meet the centaur and the dragon, and then perhaps suddenly behold, like the ancient shepherds, sheep, and dogs, and horses – and wolves. This recovery fairy-stories help us to make. In that sense only a taste for them may make us, or keep us, childish.
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J.R.R. Tolkien (The Monsters and the Critics and Other Essays)