A Reason and Purpose for Everything

I once asked a lady, who shared with me her firm and considered opinion that everything happens for a reason, and that there is, therefore, a purpose for everything, what such a belief might suggest to her. She stood, searching in vain for an answer, and eventually conceded saying she did not know. I informed her that if there is a reason and a purpose for everything would that not strongly suggest to her that there is someone behind the reason and the purpose. Would this not only prove that there is a God, that there is a Grand Design, and, therefore, a Great Designer Who is in complete and Sovereign control over everything and everyone?