Where the top of this arch may be, it is difficult to know, on account of the inequality which has been spoken of above, but for the most part I believe between the thirtieth and the fortieth year, and I believe that in the perfectly natural man it is at the thirty-fifth year.

And this reason has weight with me: that our Saviour Jesus Christ was a perfect natural man, who chose to die in the thirty-fourth year of His age; for it was not suitable for the Deity to have place in the descending segment; neither is it to be believed that He would not wish to dwell in this life of ours even to the summit of it, since He had been in the lower part even from childhood.

And the hour of the day of His death makes this evident, for He willed that to conform with His life; wherefore Luke says that it was about the sixth hour when He died, that is to say, the height or supreme point of the day; wherefore it is possible to comprehend by that, as it were, that at the thirty-fifth year of Christ was the height or supreme point of His age.

Truly this arch is not half distinguished in the Scriptures, but if we follow the four connecting links of the differing qualities which are in our composition, to each one of which appears to be appropriated one part of our age, it is divided into four parts, and they are called the four ages.

The first is Adolescence, which is appropriated to the hot and moist; the second is Youth, which is appropriated to the hot and dry; the third is Old Age, which is appropriated to the cold and dry; the fourth is Extreme Old Age, which is appropriated to the cold and moist, as Albertus Magnus writes in the fourth chapter of the Metaura.