= مرغ همسایه غازه
= used to say that other places or situations seem better than yours, although they may not really be better
= People always think they would be happier in a different set of circumstances. (Usually implies that the other circumstances really are not any better.)
#1. Jill: My job is so tedious. I wish I had my own business, like Beatrice does. Jane: Beatrice probably wishes she had the security of her old job. The grass is always greener on the other side of the fence.
** The grass is greener on the other side (of the fence)