BOOK III. · I. · The philosophical and mathematical commentaries of Proclus on the first book of Euclid's elements (Vol. 2 of 2) : $b To which are added, A history of the restoration of Platonic theology, by the latter Platonists: And a translation from the Greek of Proclus's Theological elements

Let it be granted that a straight line may be drawn from any one point to any other point.