And so, I declare once again that you ought not to view my words with disdain and scorn, for mockery can lead one to disbelief. On the contrary, one ought to possess a sense of respect and fear for the signs of Allah Almighty. Any wise person can provide a thousand responses to such allegations. Do the faces of people not possess signs by which we can distinguish between and recognise a blessed man and one who is evil, or a moral and immoral person? It is narrated in relation to the Messenger of Allah, peace and blessings of Allah be upon him, that a person saw him and said: ‘This is not the face of a liar.’
Now what sign was present on the face of liars which was not to be found on the face of the Holy Prophetsa? There was a distinction on his face that a person of insight could perceive. Who can be so foolish and ignorant that they are unable to distinguish between the face of a righteous and evil person? In the case of a believer, their face and every limb is a source of distinction for them and establishes that they are godly people. So if the ‘mark of prophethood’ on the back of the Holy Prophetsa possessed some similar distinction, do tell me, why this would be so far-fetched? Anything is possible.
(Hazrat Mirza Ghulam Ahmadas, Malfuzat, Vol. 2, p. 6)