As they stared blankly in dumb misery deepening as they slowly realised all they had seen and all they had lost, a capricious little breeze, dancing up from the surface of the water, tossed the aspens, shook the dewy roses and blew lightly and caressingly in their faces; and with its soft touch came instant oblivion. For this is the last best gift that the kindly demi-god is careful to bestow on those to whom he has revealed himself in their helping: the gift of forgetfulness. Lest the awful remembrance should remain and grow, and overshadow mirth and pleasure, and the great haunting memory should spoil all the after-lives of little animals helped out of difficulties, in order that they should be happy and lighthearted as before.

Ch. 7 - The Wind in the Willows (1908)