60. Investigation reveals that the body is the mother of the soul. The soul does not fall unto the womb of a pregnant woman from on high. Instead, it is a sort of light which lies inherent in the seminal fluid which begins to shine forth along with the physical development of the foetus. The holy revelations of God help us understand that the soul is generated in the embryonic mass which begins to take shape from the seminal fluid in the uterus. As He states in the Holy Quran:
(Ch.23:15)
This means that then We transform the body, which was prepared in the uterus, into a new creation and evolve from it a new form of existence, which is referred to as the soul. Indeed, God is the source of many blessings and is such a Creator as there is none like unto Him.
(Islami Usul ki Filasfi: Roohani Khaza'in Vol. 1, p. 321)
61. As no garden can flourish without water, no faith can be considered live without good deeds. It is meaningless to have faith without righteous actions; likewise good deeds without faith are a vain display. According to Islam, heaven in fact is the reflected image of our faith and good deeds. It is not something new which will be delivered to man from outside. In fact it is created from within him. Each man's heaven is born out of his own faith and good deeds, which he begins to experience and enjoy in this very life.
(Islami Usul ki Filasfi: Roohani Khaza'in Vol. 10, p. 390)