Plato quotes on cave

As you and Megillus have been trained in these institutions, I dare say that you will not be unwilling to give an account of your government and laws; on our way we can pass the time pleasantly in talking about them, for I am told that the distance

And the same object appears straight when looked at out of the water, and crooked when in the water; and the concave becomes convex, owing to the illusion about colours to which the sight is liable
Source: Plato, The Republic

And right appears left and left right, because the visual rays come into contact with the rays emitted by the object in a manner contrary to the usual mode of meeting; but the right appears right, and the left left, when the position of one of the two concurring lights is reversed; and this happens when the mirror is concave and its smooth surface repels the right stream of vision to the left side, and the left to the right (He is speaking of two kinds of mirrors, first the plane, secondly the concave; and the latter is supposed to be placed, first horizontally, and then vertically.)
Source: Plato, Timaeus

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Source: Project Gutenburg Texts