The popular saying "a square peg in a round hole" is how you could explain the feeling of coming back from a life where you finally felt like your edges were rounding and you could almost fit into the round hole. Now, like an octagon in a round hole, you may slip in, but you don't fill in all the spaces.
Most will be familiar with the game Sardines, the opposite of hide-and-seek. Sometimes the person who is hiding picks a really easy place. The last to find them is the next to hide. The greatest game of all has the greatest prize of all at the end. This game involves everyone in the world. No one is hiding, but everyone is searching.
"Make your self at home" is often said when you are invited into someone else's house. Even if it is your first time being there. How to settle in when this home is much larger than a house and boundaries of "making myself at home" are more complicated than if it is acceptable for me to put my feet up on the coffee table or not.