confess to human weaknesses ; for we recognize that it is day and that we are alive, and many other apparent facts in life ; but with regard to the things about which our opponents argue so positively, claiming to have definitely apprehended them, we suspend our judgement because they are not certain, and confine knowledge to our impressions/ For we admit that we see, and we recognize that we think this or that, but how we see or how r we think we know not. And we say in conversation that a certain thing appears white, but we are not positive that it really is white. As to our ' We determine nothing ' and the like, 5 we use the expressions in an undogmatic sense, for they are not like the assertion that the world is spherical. Indeed the latter statement is not certain, but the others are mere admissions. Thus in saying ' We determine nothing,' we are ?wt determining even that." Again, the dogmatic philosophers maintain that the Sceptics do away with life itself, in that they reject all that life consists in. The others say this is false, for they do not deny that we see ; they only say that they do not know how we see. " We admit the apparent fact," say they, " without admitting that it really is what it appears to be." We also perceive that fire burns ; as to whether it is its nature to burn, we suspend our judgement. We see that a man moves, and that he perishes ; how it happens we do not know. We merely object to accepting the unknown substance behind phenomena. When we say a picture has projections, we are describing what is apparent ; but if we say that it has no projections, we are then speaking, not of what is apparent, but of something else. This is