Itās just a statement that the pope is the vicar of Christ. Hereās the phrase in context:
But since We hold upon this earth the place of God Almighty, Who will have all men to be saved and to come to the knowledge of the Truth, and now that Our advanced age and the bitterness of anxious cares urge Us on towards the end common to every mortal, We feel drawn to follow the example of Our Redeemer and Master, Jesus Christ, Who, when about to return to Heaven, implored of God, His Father, in earnest Prayer, that His Disciples and followers should be of one mind and of one heart: I pray . . . that they all may be one, as Thou Father in Me, and I in Thee: that they also may be one in Us.
Now does that sound like somebody who thinks they are the equal of God?