The Rabbenu Bachaya in Parashas Korach explains the reason keeping our feet together at the shmonei esrei besides being like malachim. We want to show that without Hashem’s help our feet are tied and thereby we recognize that only He can grant our wishes and no one else. That is what the first three brochos depict. One, there is a Supreme Being who remembers what our forefathers accomplished and brings the redemption in their zechusim. Two, He is mashgiach on us constantly and provides us our needs. Three, He is the only One able to give us this provision and therefore, the only One to daven to.
