The best religion is mine: I venerate, but do not worship the following things 1) my ancestors, 2) the Republic, 3) Nature.
These three things actually exist (unlike jewish fairy tales). They are the source of my life. They can do harm, but must exist in order for me to exist. I also seek to uphold the classical virtues, the golden rule, and a general love for the long-term, common interest of humanity.