Since truth and error enter our minds by the door which the senses open to knowledge, we are soon obliged to be on our guard against illusions.


Translated by Katharine Royce, Problems of Science, Introduction (p. 10), The Open Court Publishing Co. 1914


Since truth and error enter our minds by the door which the senses open to knowledge, we are soon obliged to be on our guard against illusions.

Since truth and error enter our minds by the door which the senses open to knowledge, we are soon obliged to be on our guard against illusions.

Since truth and error enter our minds by the door which the senses open to knowledge, we are soon obliged to be on our guard against illusions.

Since truth and error enter our minds by the door which the senses open to knowledge, we are soon obliged to be on our guard against illusions.