The entire revelation which the non Ahmadi Muslims try to mock at is:
” I decided to appoint a Khalifah [vicegerent] from Myself so I created Adam. I will establish in the earth.”
What they do not understand is that on the same page where they have taken this from, Ahmad(as) has beautifully explained its meaning. Sadly they try to do their own interpretations.
Mirza Ghulam Ahmad(as) states:
‘I am going to establish him’. The word khalifah in this revelation means a person who would be the means of conveying the message and guidance between Allah and His creatures. Here it does not signify kingdom or government….Instead, it connotes only a spiritual office and spiritual vicegerency. Also, in this revelation, Adam does not refer to the Adam, the father of mankind. It means a person through whom a movement of conveying the message and guidance should be established for the spiritual revival of mankind. He will thus be in the position of a spiritual father for the seekers of truth. This is a grand prophecy predicting the establishment of a spiritual movement at a time when none of its insignia are visible. [Barahin-e-Ahmadiyyah, part 4, pp. 489–493 sub-footnote 3, Ruhani Khaza’in, vol. 1, pp. 581–586 sub-footnote 3]