Imam sheds light on the subject as following:
O poor fellow! You had only external sight and were blind inwardly.
You are realizing your blindness now, while you were already blind from the very beginning. You did not possess the inner vision, which could perceive His clear signs.
You, the poor creature, who was endowed with a perfect earthly body and proportionate form, alas you did not know that the measures of the hidden and sublime world are different from this world.
You should strive for inner uprightness, so that you may be upright on the Last Day. Your spirit should be a human spirit, so that your form in the Barzakh and the Hereafter may be a human form.
You are mistaken to consider the world of the hidden realities, where the secrets of this world are to be unveiled and your deeds are to be disclosed, as similar to this world of appearances, where one can deceive others and can create chaos, confusion, and misjudgment.
Your eyes and ears, your hands and feet, and other parts of your body will bear witness against your deeds in this world with their supernatural tongues. Some of them may also appear in their celestial forms.
So, my friend, it is necessary to keep open the ears of your heart. Be brave, and have mercy on your own self, so that you may leave this world in a human form, and may be counted as redeemed and virtuous.
Mind you, these words repeatedly occur in the speeches and teachings of great thinkers, in the inspirations of mystics and in the transmissions of the truthful and infallible servants of God.