Hi, Teachers.

I saw this sentence from a reading material:
Remember that you will die, that everything ends, and that happiness comes not in denying this but in living with it.

I think it's a very nice sentence, isn't it? But I don't know why the writer used 'everything ends' but not 'everything will end.' In my opinion, the former one sounds that everything is ending. Can you give some advice?

Thanks in advance.