Mindfulness

Ὥσπερ ἀδιαλείπτωσ ἀναπνέομεν τὸν ἀέρα, οὕτως ἀδιαλείπτως ὀφείλομεν τὸν Κύριον αἰνεῖν τε καὶ ὑμνεῖν, κἂν ἑν μέσῳ πραγμάτων στρεφώμεθα. Δύναται γὰρ ὁ φρόνιμος, καὶ θεοφιλὴς νοῠς δηκενῶς μνήμην σώζειν τοῦ Κτίσαντος. Ἐμνήσθην γὰρ, φησὶν ὁ Δαυϊδ, τοῦ Θεοῦ, καὶ ηὐφράνθην. Εἰ τοίνυν ἡ τοῦ Δεσπότου μνήμη εὐφροσύνην ἐμποιεῖ ταῖς ἡμετέραις ψυχαῖς, μὴ κατοκνήσωμεν ἀπολαύειν τῆς μνήμης τοῦ Θεοῦ. Ἅγιος Νειλος, Βιβλίον Πρῶτον, Ἐπιστολή ΣΛΘ’ Σοσανρῳ Πριμασκρινιῳ Source: Migne PG 79.169d

As we continuously breathe air, so we should continuously sing and hymn the Lord, even when we are embroiled in worldly affairs. For it is possible for the prudent and pious mind to be continuously mindful of its Creator, as David says, 'I was mindful of God and I rejoiced.' 1 Thus if the memory of the Lord brings joy to our souls, let us not neglect to take joy in the remembrance of God. Saint Nilus of Sinai, Book 1, Letter 239, To Sosandros the Primiscrinius 1 Ps 76.4