Come, turn, etc. full circle
Definition 1 of 1
Pro Tip 1/3Not Literal
The phrase is figurative, meaning the situation has similarities with the starting point. 
After switching professions multiple times, she has come full circle to teaching again.
Pro Tip 2/3End of Journey
Often implies a long process or journey has been completed and has arrived back where it began. 
The family's antique vase was sold, and through auctions, come full circle back to us.
Pro Tip 3/3Life Phases
Can relate to life stages, suggesting a return to past behaviors or situations as one ages. 
My grandfather’s habits have come full circle; as a child, he loved painting, and now he's painting again.