You're allowed to outgrow rooms that once felt like home. Loyalty to an old version of you isn't a virtue; it's a cage.

The thought behind it

The guilt was borrowed. This line gives it back and lets you keep the thing you were quietly ashamed of wanting. In Quiet Power restraint is the whole discipline, and it pays in a currency nobody else can see. Everything hinges on “outgrow”, which is the part a politer version of this sentence would have left out.