When your wife dies, it feels like there is going to be no more joy in your life. This is not true. True joy comes from accepting the truth and then moving forward from there. How one gets there is a wholly personal matter and it may take years before this feeling of joy returns to your life. So actively seek out joy. Watch funny movies, see your funny friends, laugh if you can. Your wife hears every laugh and she gets joy from that too. Your wife does not want you to be sad forever, even if you never stop loving her.