Muddy Pearl

John Owen said, as he set out to write his classic treatise on the Holy Spirit, that he found it, 'A work too great and difficult for me to undertake and beyond my ability to manage to the glory of God, or the good of men, ...

What is prayer? How does it work? And does it even help at all? Where do we start and where will it lead? These are questions that Johannes Hartl has spent his life exploring.