I paint as little as possible, so the arm is rusty, but, like riding a bicycle, it comes back quickly.
In painting, as in life, you must be both tough and gentle. You must know how much pressure to apply and when. Push too hard and the paint splatters, too lightly and there's no coverage.
Painting is also comparable to life in this fact — that by the time you get the hang of it, it's time to stop.