There is no 'earthly' reason [=there is no reason on earth; there is no reason at all] for feeling that way.
What 'earthly' [='possible', 'conceivable'] good could it do him?
our 'earthly' existence
(..) - I go to a pizza place. - Yeah. If I want Thai, I go... I go to a Thai place. I mean, what is the... what is the earthly point... Did I marry you? ...in comparing pizza to Thai food? What has happened to your intelligence? (..)2013 TvShow: Breaking Bad Title: Felina Season: 5 Episode 16