4. And because there is (separate) denotation of the object and the agent.
The clause 'When I shall have departed from hence I shall obtain him' denotes the highest Brahman as the object to be obtained, and the individual soul as that which obtains it. This shows that the soul which obtains is the person meditating, and the highest Brahman that is to be obtained, the object of meditation: Brahman, therefore, is something different from the attaining soul.