Ephesians 4:4-6 "(4) There is one body, and one Spirit, even as ye are called in one hope of your calling; (5) One Lord, one faith, one baptism, (6) One God and Father of all, who is above all, and through all, and in you all."
Our world would have us believe there are many gods, many faiths, many baptisms, and all we have to do is choose the one we like. According to Paul, thats not so. It would only be sensible to find out who that ONE GOD is and serve Him with all your heart.