Offering prayers is for your own sake. Simply keep your mind straight and plaint, honest and law-abiding. Be respectful for those who are above you, and be compassionate to those who are below you. Accept things as they are: what you have as what you have, what you don't as what you don't. Doing so seems to accord with the Buddha and Shinto deities. Even if you don't pray, by keeping this in mind you will enjoy various deities' protection. Even if you pray, though, if your mind is crooked, you'll be abandoned by Heaven's Way. So be careful.
Hôjô Sôun (Sôunji Dono Nijuchichi Kajo article 5)
Ta tá por ahora