Whoever knows Me, the supreme Reality, as unborn and beginningless, and also as the very Lord of the Universe, he, among the humans, becomes free of all delusion, and gets freed of all blemishes.
Krishna obviously is speaking about his Self, the ‘I’, not about his body. His Self and that of others are the same. This was the first revelation he made to Arjuna (2.12): “I, you and the others around were existing earlier, as are we all now. We shall be existing hereafter too.” Ceaseless presence is the nature of the Self. Such Self-knowledge is all-transforming.
Here too he confirms that he is unborn. Others also are equally so. To know Krishna as unborn, beginningless, is to know that oneself is also alike. As is Krishna, so is another, the singular spiritual Truth. Hence whatever is true of Krishna, a Knower, is true of others as well, the Self being changeless.
Panca-bhutas, mind, intelligence and ego make the whole Creation (7.4). They constitute the human too. This knowledge frees one of delusion and sinfulness.