Having then from nature abundant means for examining the statements made, we ought to discover the sequence of the truth. Wherefore also we are rightly condemned, if we do not assent to what we ought to obey, and do not distinguish what is hostile, and unseemly, and unnatural, and false, from what is true, consistent, and seemly, and according to nature. And these means must be employed in order to attain to the knowledge of the real truth.