G-d and G-d alone

“When, during the reign of Hadrian, the uprising led by Bar Kochba proved a disastrous error, it became essential that the Jewish people be reminded for all times of another important fact; namely, that Israel must never again attempt to restore its national independence by its own power; it was to entrust its future as a nation solely to Divine Providence. Therefore when the nation, crushed by this new blow, had recovered its breath and hailed even the permission to give a decent burial to the hundreds of thousands who had fallen about Betar as the dawn of a better day, the sages who met at Yavneh added yet another blessing to the prayer for the restoration of Jerusalem. This fourth blessing is an acknowledgement that it has always been G-d and G-d alone Who has given us, and still gives us to this very day, that good in which we have had cause to rejoice; and that for future good, too, we may look to none other but G-d, and none besides Him." (RSRH, Commentary to the Prayer Book, p. 703)