"If I remember right it is, 'illud cujus nulla pars est'; that which has no parts."
"Has it existence?"
"Only in our minds."
"Not, then, in God?"
"All necessary truths exist first in God. If the point is a necessary truth, it exists first there."
"Then might I ask you for Euclid's definition of the line?"
"The line is that which has only extension; 'Linea vocatur illa quae solam longitudinem habet.'" "Can you conceive an infinite straight line?"
"Only as a line which has no end, like the point extended."
"Supposing we imagine a straight line, like opposite rays of the sun, proceeding in opposite directions to infinity—is it real?"
"It has no reality except in the mind that conceives it."