Paramatman (Sanskrit) — Highest, Divine Atman: the same as Ishvara.
Atman is the Higher Self of human beings, Paramatman is the Higher Self of God. They are coessential. Their cognition and securing oneself in Them means Mergence of an adept with God, the final Enlightenment, full Self-realization, attainment Divinity. This is the end of personal evolution.
See also:
• Ishvara