When once you have tasted flight, you will forever walk the earth with your eyes turned skyward, for there you have been and there you will always long to return. — Leonardo da Vinci
Found on Mark Shuttleworth’s site, and it typifies how I feel about having a dented head (plus a zillion & one little side-effects) after having not had one for four decades.
Having a small conceptual capsule to store the concept in helps me to — such as is possible — get over it. Thanks, Mark! Thanks, Leonardo!