Does God need us? Someone called up Rabbi Avigdor Miller zt"l and asked, "Why does HaKadosh Boruch Hu need our tefillah and our mitzvahs, and why does HaKadosh Boruch Hu get so much flattery?" Rav Avigdor Miller explains very clearly, that HaShem does not need our Tefillah or our Mitzvahs, everything we do is for our own benefit.