According to Catholic doctrine, ordination as a priest leaves an indelible mark on the soul. This idea applies elsewhere. When I graduated from medical school and took the Hippocratic Oath, I believe it made a mark on my soul. Though I’m retired, I will always be a physician. When Putin joined the KGB and rose to lieutenant colonel, it made a mark on his soul. We see the results. You can change jobs, but it’s still you.