In prayer, God interacts with us as sovereign Creater; but he also interacts with us on our level. Both of these have practical value in prayer. Both of these (together) are the reason we can trust him, and can know that, in all things, he will work for the good of those who love him (as in Romans 8:28)!
[This series "Learning about Prayer" is based on: An In-Depth Study on the Topic of Prayer.]