(… قَالَ رَبِّ أَنَّىٰ يَكُونُ لِي غُلَامٌ وَقَدْ بَلَغَنِيَ الْكِبَرُ وَامْرَأَتِي عَاقِرٌ ) (He said, “My Lord, how will I have a boy when I have reached old age and my wife is barren?”…): Here we have the politeness of the prophets embodied. It’s well-known that men, regardless of how old are they, can have children. Yet, Zechariah (PBUH) didn’t want to say that his wife was barren without mentioning his old age before. It could have been enough to say that his wife was barren; still, he said he was old before saying stating the problem of his wife as a token to honor her.
( قَالَ كَذَٰلِكَ اللَّهُ يَفْعَلُ مَا يَشَاءُ … ) (…The angel said, “Such is Allah; He does what He wills.”): The Almighty brings the dead to life, provides without account and does everything with no reasons. Whenever the Almighty wants something done He says ‘be’ and it will be. It’s only the Almighty who does what He wants not humans. We, mortals, may want to do something but our conditions changes from strength to weakness, health to illness, richness to poverty, and life to death.