US-P18.027ab ।US-P18.027cd ॥
In plain words
In the constant presence of the Self, its reflection arises, generating the sense of identification. From this comes the dual pair of 'I' and 'mine', the one referred to as 'I' and the other as 'mine'.
Close to the Sanskrit
In the proximity of that at all times, there is its reflection making identification; the pair of self and mine and hence ego-and-mine-object comes to be.