In short: Considering the utter disparity between -on the one hand- this state of affairs which we see together with the universal fusions of life and the swift separations of death, the imposing gatherings and the rapid dispersions, the magnificent revolutions and the great manifestations, and -on the other hand- the petty fruits we see briefly attained in this transient world, the temporary and insignificant purposes of beings that pertain to this world, we conclude that the non-existence of the hereafter would mean attaching to a little stone wise purposes as great as a mountain, and to a great mountain, a purpose as petty as a small stone. No intelligence or wisdom can find this acceptable.
In other words, this lack of proportion between beings and these matters on the one hand, and their purposes pertaining to this world on the other, demonstrates with certainty that all beings have their faces turned to the world of meaning. It is there that they will yield their appropriate fruits, and their eyes are fixed on the Sacred Names. Their ultimate aims pertain to that world alone. While their substance is hidden beneath the soil of this world, their flowers will unfold in the World of Similitudes. Man sows and is sown in this world, in accordance with his capacity; the harvest is gathered in the hereafter.