Thou hast asked me concerning the nature of the soul. Know verily that the soul is a sign of God, a heavenly gem whose reality the most learned of men hath failed to grasp, and whose mystery no mind, however acute, can ever hope to unravel. It is the first among all created things to declare the excellence of its Creator, the first to recognise His glory, to cleave to His truth, and to bow down in adoration before Him. But afterward they differ from one another insofar as they acquire excellencies or defects.
Divine perfection is infinite, therefore the progress of the soul is also infinite.
In that world there is need of spirituality, faith, assurance, the knowledge and love of God. These he must attain in this world so that after his ascension from the earthly to the heavenly Kingdom he shall find all that is needful in that life eternal waiting for him. First, through the knowledge of God. Second, through the love of God. Third, through faith.