US-P16.041ab ।US-P16.041cd ॥
In plain words
Because the true nature of the Self has no cause, whereas all other things are conditioned by causes. Thus, this essential nature is neither something to be newly acquired nor something ever abandoned by itself.
Close to the Sanskrit
Because the essential nature is without a cause, while other things have a cause indeed; and the essential nature is unacquired and likewise never abandoned by itself.