What that means is, you believe the darkness can 'stay dark' while you enter the light. But this is impossible because light dispels darkness.
So the light of God, Holy Spirit's mind, the right mind, 'level 2', etc... will repel the darkness of the ego. It would dispel the ego, so it cannot ever approach it. Darkness has no real effect on the light.
When you try to do this, you are creating a 'spiritualized ego' which attempts to make it SEEM like you're more spiritual or more light when in fact it MUST all be an illusory form or appearance, deceiving yourself, because darkness literally CANNOT, even a tiny bit, become light.
Darkness is REPLACED by light. When light replaces darkness, you wake up FROM darkness.
Similarly, you cannot bring the light into the darkness. You can shine a light SO THAT darkness is shone away. When you bring the light toward the darkness, the darkness MUST disappear. So again, light and dark cannot combine. The dark cannot be made light, and the light cannot be made dark. They are mutually exclusive.
So again, one of the properties of the spiritual ego is the attempt to bring light into the darkness, into the world, in such a way as to KEEP the world the same as it is and NOT dispel illusions. This doesn't mean you can't bring 'heaven to earth', because by doing so you actually dispel and REPLACE darkness. But the ego has many ways to pretend to bring light into the world which are deceptive.
The only option for you is, to leave the darkness behind and go into the light. That means detaching from the ego's mind, and attaching to Holy Spirit.