Is Faith The Only Way To Believe God Exists?

My group and I discussed the topic and we came to a conclusion that faith is needed to believe in God.  It is not that it is the only way but you must have faith to believe in God.  Whether you believe in God through Reason or Divine Revelation, Faith must be there for you to truly believe in Him.  God is an all powerful being that millions around the world believe in.  And every single one of them has faith.