Musar su Salmi 22:18

8) Our sages of blessed memory have said (Ibid.): "The Holy One Blessed be He does not reject the prayer of the many, it being written (Job 36:5): 'G-d is mighty, and will not reject [the many].'" This, as opposed to one praying alone, when each blessing is scrutinized for proper intent. As we find in the holy Zohar on the verse (Psalms 102:18): "He will turn to the prayer of the devastated one, and will not reject their prayer" [that of the many.] And it is well known that today there are many disturbances and it is almost impossible to find a man who prays one prayer with proper intent, unless he labors on it greatly. Now does not each man wish his prayer to be accepted above? If so, in any event, he must fall back upon this counsel, to pray with the congregation, of which it is written (Job, Ibid.) "G-d is mighty, and will not reject [the many]."