To become enlightened, go to Mercury and complete the missions there:
*** Spoiler - click to reveal ***
1. Go straight ahead from start on Mercury, to find a large sky scraper.
2. Enter the sky scraper (base)
3. Restore power and certain systems by going to the console to the right (your nanites will do the work)
4. Visit the central console to learn that there are people trapped in the building
5. Go up 2 flights of stairs, down the hall, and to the right. Approach the room with the lit door handle.
6. Help rescue the colonists (talk and discuss how to escape)
7. Go outside the building and investigate the equipment in the roof to become enlightened!