How a man becomes pregnant with Gods spirit

In Chapter 66 Verses 11 and 12 of the Holy Quran Allah says that the believers who achieve the highest level of purity are Mary.

Once a believer becomes Mary then Allah breaths into him His spirit just like He breathed His spirit into Mary to make her pregnant with Jesus. Hazrat Mirza Ghulam Ahmad wrote this in his book without giving reference to the fact that he was taking this from the Holy Quran. Our opponents subject Hazrat Mirza Ghulam Ahmad’s statement to much ridicule. We wonder what they will say now that we have shown that Hazrat Mirza Ghulam Ahmad was simply re-iterating the message of the Holy Quran.