ἐσωτερικός
From LSJ
ἄνθρωπός ἐστι πνεῦμα καὶ σκιὰ μόνον → human being is only a breath and a shadow, man is but a breath and a shadow
English (LSJ)
ή, όν,
A inner, esoteric : ἐσωτερικά, τά, of certain Stoic doctrines, Gal.5.313 ; ἐ. μαθήματα Iamb.Comm.Math.18 ; of persons, -κοί, οἱ, the disciples of Pythagoras, Id.VP17.72 ; μέμνησο τὸν μὲν ἐ., τὸν δὲ ἐξ. καλεῖν (of Aristotle), Luc.Vit.Auct.26. (Prob. coined to correspond with ἐξωτερικός (q.v.).)