And respecting this there is an enlarged discussion, whence both Simon and Valentinus will be found both to have derived from this source starting-points for their opinions, and, though they may not acknowledge it, to be in the first instance liars, then heretics. Since, then, it appears that we have sufficiently explained these tenets likewise, and that all the reputed opinions of this earthly philosophy have been comprised in four books; it seems expedient to proceed to a consideration of the disciples of these men, nay rather, those who have furtively appropriated their doctrines.