US-P18.110ab इत्येवं प्रतिपत्तिः स्यात् सदस्मीति च नान्यथा ।US-P18.110cd तत् त्वमित्युपदेशोऽपि द्वाराभावादनर्थकः ॥
In plain words
Realization must take this exact form—'I am existence itself'—and no other. If it were otherwise, even the great teaching 'That thou art' would be pointless, since no mediating step would remain.
Close to the Sanskrit
Thus indeed should be the realization: 'I am existent', and not otherwise. Otherwise even the instruction 'That thou art' would be meaningless due to the absence of a means.