Or in simpler words it can be said that each good or evil...

Or in simpler words it can be said that each good or evil action brings into being a real effect within the soul of man which determines the character of his future life. Whether he understands it or not, man is like a child who is being trained. From the instructions of the teacher, the child hears nothing but do's and don'ts but does not understand the meaning of the actions he performs.

Yet, when he grows up, as a result of virtuous mental and spiritual habits attained inwardly during the period of training, he is able to have a happy social life. If, however, he refuses to submit to the instructions of the teacher he will undergo nothing but misery and unhappiness. Or he is like a sick person who, when in the care of a physician, takes medicine, food and special exercises as directed by the physician and who has no other duty than to obey the instructions of his doctor.

The result of this submission to his orders is the creation of harmony in his constitution which is the source of health as well as every form of physical enjoyment and pleasure. To summarize, we can say the within his outward life man possesses an inner life, a spiritual life, which is related to his deeds and actions and develops in relation to them, and that his happiness or misery in the hereafter is completely dependent upon this inner life. The Holy Quran also confirms this explanation.

In many verses it affirms the existence of another life and another spirit for the virtuous and the faithful, a life higher than this life and a spirit more illuminated than the spirit of man as we know it here and now. It asserts that man's acts have inner effects upon his soul that remain always with him. In prophetic sayings there are also many references to this point.

For example, in the Hadith-i mi'raj (hadith of the nocturnal ascension) God addresses the Prophet in these words: "He who wishes to act according to My satisfaction must possess three qualities : he must exhibit thankfulness that is not mixed with ignorance, a remembrance upon which the dust of forgetfulness will not settle, and a love in which he does not prefer the love of creatures rather than My love.

If he loves Me, I love him ; I will open the eye of his heart with the sight of My majesty and will not hide from him the elites of My creatures. I will confide in him in the darkness of the night and the light of the day until conversation and intercourse with creatures terminates.