Shankaracarya declares the natural and spontaneous faith of animals in objective reality.
Moreover, there is no difference (of the learned) from the animals (in regard to empirical behaviour). Just as animals and others turn away from sound etc. when these appear unfavourable after their ears etc. come into contact with them, and they move towards these when they are favourable; and just by noticing a man approaching them with a raised stick, they begin to run away thinking, “This one wants to hurt me”, and they approach another carrying green grass in his hands, similarly even the wise are repelled by the presence of strong, uproarious people with evil looks and upraised swords, and are attracted by men of opposite nature. Therefore the behaviour of men with regard to the means and objects of knowledge is similar to that of animals.(from the Preamble to Brahma-Sutra-Bhasya)
As soon as I would put out my hand with an apple in it the pony in the field would come running over. Must I put Descartes before that horse?