Allah said,
﴿إِنَّ مَثَلَ عِيسَى عِندَ اللَّهِ﴾
(Verily, the likeness of `Isa before Allah) regarding Allah's ability, since He
created him without a father,
﴿كَمَثَلِ ءَادَمَ﴾
(is the likeness of Adam), for Allah created Adam without a father or a mother.
Rather,
﴿خَلَقَهُ مِن تُرَابٍ ثُمَّ قَالَ
لَهُ كُن فَيَكُونُ﴾
(He created him from dust, then (He) said to him: "Be!'' and he was.)
Therefore, He Who created Adam without a father or a mother is able to create `Isa,
as well, without a father. If the claim is made that `Isa is Allah's son because
he was created without a father, then the same claim befits Adam even more. However,
since such a claim regarding Adam is obviously false, then making the same claim
about `Isa is even more false.
Furthermore, by mentioning these facts, Allah emphasizes His ability, by creating
Adam without a male or female, Hawa' from a male without a female, and `Isa from
a mother without a father, compared to His creating the rest of creation from male
and female. This is why Allah said in Surah Maryam,
﴿وَلِنَجْعَلَهُ ءَايَةً لِّلْنَّاسِ﴾
(And We made him a sign for mankind) 19: 21.
Allah said in this Ayah,
﴿الْحَقُّ مِن رَّبِّكَ فَلاَ تَكُنْ
مِّن الْمُمْتَرِينَ ﴾
((This is) the truth from your Lord, so be not of those who doubt.) meaning, this
is the only true story about `Isa, and what is beyond truth save falsehood Allah
next commands His Messenger to call those who defy the truth, regarding `Isa, to
the Mubahalah (the curse).