it is allah who created you in a state of weakness then after weakness he gave you strength then after strength he made you weak and old. he creates what he pleases. he is allknowing allpowerful.
الله الذي خلقكم من ضعف ثم جعل من بعد ضعف قوة ثم جعل من بعد قوة ضعفا وشيبة يخلق ما يشاء وهو العليم القدير