Tacitus about the practices of the Germans

The Germans, however, do not consider it consistent with the grandeur of celestial beings to confine the gods within walls, or to liken them to the form of any human countenance. They consecrate woods and groves, and they apply the names of deities to the abstraction which they see only in spiritual worship. Tacitius
. For the rest, from the grandeur and majesty of beings celestial, they judge it altogether unsuitable to hold the Gods enclosed within walls, or to represent them under any human likeness. They consecrate whole woods and groves, and by the names of the Gods they call these recesses; divinities these, which only in contemplation and mental reverence they behold.
To the use of lots and auguries, they are addicted beyond all other nations. Their method of divining by lots is exceedingly simple. From a tree which bears fruit they cut a twig, and divide it into two small pieces. These they distinguish by so many several marks, and throw them at random and without order upon a white garment. Then the Priest of the community, if for the public the lots are consulted, or the father of a family about a private concern, after he has solemnly invoked the Gods, with eyes lifted up to heaven, takes up every piece thrice, and having done thus forms a judgment according to the marks before made. If the chances have proved forbidding, they are no more consulted upon the same affair during the same day: even when they are inviting, yet, for confirmation, the faith of auguries too is tried. Yea, here also is the known practice of divining events from the voices and flight of birds. But to this nation it is peculiar, to learn presages and admonitions divine from horses also. These are nourished by the State in the same sacred woods and groves, all milk-white and employed in no earthly labour. These yoked in the holy chariot, are accompanied by the Priest and the King, or the Chief of the Community, who both carefully observed his actions and neighing. Nor in any sort of augury is more faith and assurance reposed, not by the populace only, but even by the nobles, even by the Priests. These account themselves the ministers of the Gods, and the horses privy to his will.