Something I heard in an alan watts video.
If we assume a few things:
1. The only thing that really differentiates us from another being are our memories (basically)
2. When you die you lose your memories
3. New beings are being born all the time
Through practice, you can find a whole lot of things we aren't, once you do you'll realize that personal identity is just an illusion, and yet there is still existence. Thing's pop in and out of existence based on the presence of other things, causes and conditions, yet none of the things that come into existence, exist in their own right.
So you can't really say anything exists, yet thing's do exist, in an illusory manner.
It's impossible for me to put it into any words better than that, hope it helps.
"We know nothing at all. All our knowledge is but the knowledge of schoolchildren. The real nature of things we shall never know." - Albert Einstein