why pray?

Matthew 5:8b
.. your Father knows what you need before you ask him

If God already knows what I need, then what's the point of praying? That question seems to make sense but it probably reveals a misunderstanding of the fundamental nature of prayer. If prayer is simply a transaction, with God knowing what I need and going to provide, then there is probably little point in praying. But prayer isn't a transaction, it's a conversation with our Father. I regularly borrow tools from my dad and he is always happy to give them to me, but my interaction with him consists of far more than me turning up at his house, saying "pressure washer", him handing it over and me walking away. Prayer is not about the end result, it's about the person you're praying to - your Father in heaven.