In the morning after the wake, you will enter a Mind Palace section where you are auto running and can only steer left or right. Numerous doors will pop up in front of you, dodge all of them until you see one with words on it that say "steady yourself". This will start the next section where all the doors have words on them, run through the one that says "take control". The third section is a little trickier as doors will spawn in front of you, get to the one that says "focus" to end the section.
The trick here for an achievement is you have to complete all sections without going through any of the other doors, if you do you'll have to restart the chapter. The controls here aren't great since you can't slow down and a lot of the doors are really close to each other, I had much better luck running on the left side of the screen versus the right. Next you will spawn in room with three mirrors, choose the left one to end the sequence and unlock the A foot in the door achievement.