Page:The Prose Works of Percy Bysshe Shelley (Volume 2).djvu/304

290 The science of mind possesses eminent advantages over every other with regard to the certainty of the conclusions which it affords. It requires indeed for its entire developement no more than a minute and accurate attention to facts. Every student may refer to the testimonials which he bears within himself to ascertain the authorities upon which any assertion rests. It requires no more than attention to perceive perfect sincerity in the relation of what is perceived, and care to distinguish the arbitrary marks by which are designated from the themselves.

We are ourselves the depositaries of the evidence of the subject which we consider.