Attention: I'm not a teacher.
Hi
There are two examples concerning the matter in question. I think that’s simple enough. It is not necessary to enter into long explanation for such one elementary expression.
When once you have tasted flight you will always walk the earth with your eyes turned skyward: for there you have been and there you will always be.
- Henry Van Dyke
For once you have tasted flight, you will always walk the earth with your eyes turned skyward, for there you have been and there you long to return."
- Da Vinci.
Regards.
V.