Awareness is self is immortality, and false knowledge which cause unawareness of the Self is indeed real death.
Those who are attached to the senses and are driven by desire and identify themselves with their bodies lead hollow lives devoid of any significance and undergo repeated cycles of birth and death.
The wise ones, overcoming desires, destroy all karma, good as well as bad, and become free from birth and death.
Through realization of the Supreme Self, death truly gets conquered.
Source - Dhritharashtra - Sanat Suajata Dialogue in the Mahabharata