ψαυστέον
From LSJ
Οὐδείς, ὃ νοεῖς μὲν, οἶδεν, ὃ δέ ποιεῖς, βλέπει → Quid cogites, scit nemo; quid facias, patet → nicht weiß man, was du denkst, doch sieht man, was du tust
English (LSJ)
one must touch, Antyll. ap. Orib.10.23.23.
Greek (Liddell-Scott)
ψαυστέον: ῥημ. ἐπίθ., πρέπει τις νὰ ψαύσῃ, Ἄντυλλ. παρ’ Ὀρειβασ. 2. 436, Dar.