In a previous Thomistica posting I contended that Aquinas reformulates Aristotle’s third argument for the eternity of motion. The third argument is the argument from the eternity of time. In this third argument the now of time is characterized as middle such that there is always a now before and a now after. The argument includes the unfortunate comparison of the now of time to the point of a line. The comparison invites the easy rebuttal that the end points of a line are not middles and so perhaps not all nows are middles. The third argument can, then, proceed only by begging the question about all nows being middles.