प्रभु चरित्र सुनिबे को रसिया। राम लखन सीता मन बसिया॥ Whatever mantra you chant Hanuman Ji, keeping in your mind its indicating, chant it slowly and gradually or mentally with entire devotion. Never chant the mantra aloud. You may or may not believe in supernatural forces, but it's a perception https://bentdirectory.com/listings13223193/the-basic-principles-of-hanuman-chalisa