G-d helps and provides words for one to prevail and be victorious despite all
When one speaks before the Holy One Blessed He and expresses his words with argumentations and supplications, and desires to best the Holy One Blessed He, so to speak, that He should do his bidding, the Holy One Blessed He derives exquisite pleasure and joy from this, that they are defeating Him. Therefore He Blessed He, Himself sends him words in his mouth, so that he can defeat Him, because otherwise it would certainly be impossible for (man of) flesh and blood to defeat the Holy One Blessed he, just, Hashem Yisburach Himself helps him with this, as mentioned above.
(Likutay Moharan 124; Outpouring of the Soul 24)