Bodily exercise, when compulsory, does no harm to the body but knowledge which is acquired under compulsion obtains no hold on the mind.
I rather think the cinema will die. Look at the energy being exerted to revive it -- yesterday it was color, today three dimensions. I don't give it forty years more. Witness the decline of conversation. Only the Irish have remained incomparable conversationalists, maybe because technical progress has passed them by.