1. on earth - Adverb
2. on earth - Phrase
used with question words to convey surprise
Source: WordNetChrist, invisible to the bodily eye, manifests Himself on earth clearly through His Church ... The Church is the Body of Christ both because its parts are united to Christ through His divine mysteries and because through her Christ works in the world. John of Shanghai and San Francisco
Equality may perhaps be a right, but no power on earth can ever turn it into a fact. Honoré de Balzac
The most precious thing for us is eternity. So, we must do everything not to lose it, because then we have lived on earth for nothing. Cleopa Ilie
As the sun's shadow shifts, so there is no permanence on earth. Afghan Proverb
He who looks only at heaven may easily break his nose on earth. Czech Proverb
Many who build castles in the air cannot build a hut on earth. German Proverb