This is the 16575th most frequent Russian word.
святое
Holy; sacred.
Here, 'святое' is used as an adjective in its neuter form to describe the abstract concept of love for the homeland as 'sacred' or 'holy.'
Любовь к родине — это святое.
Love for one's homeland is sacred.
In this sentence, 'святое' functions as an adjective in its neuter form to qualify 'дело' as 'sacred' or 'holy,' indicating its inviolability and importance.
Сохранять память о предках — святое дело.
Preserving the memory of ancestors is a sacred duty.
Here, 'святое' is used as an adjective in its neuter form as part of the phrase 'что-то святое,' emphasizing the sacredness of religion for many people.