obstantia

ἔνδον σκάπτε, ἔνδον ἡ πηγή τοῦ ἀγαθοῦ καί ἀεί ἀναβλύειν δυναμένη, ἐάν ἀεί σκάπτῃς → Dig within. Within is the wellspring of Good; and it is always ready to bubble up, if you just dig. | Look within. Within is the fountain of the good, and it will ever bubble up, if thou wilt ever dig.

Latin > English (Lewis & Short)

obstantĭa: ae, f. obsto,
I a standing before or against, a resistance, hinderance, obstruction (only in Vitr.): terrae, Vitr. 9, 5, 4: aëris, id. 6, 1: umbrarum, id. 8, 1.
obstantĭa: ĭum, n., v. obsto
I fin. c.

(1) obstantĭa, æ, f., c. obstaculum : Vitr. Arch. 9, 5, 4.
(2) obstantĭa,¹⁵ ĭum, pl. n., c. obstaculum : Tac. Ann. 1, 50.