доверяй, но проверяй → πίστευε και ερεύνα
Trust, but verify (Russian: Доверяй, но проверяй, tr. Doveryay, no proveryay, IPA: [dəvʲɪˈrʲæj no prəvʲɪˈrʲæj]) is a rhyming Russian proverb. The phrase became internationally known in English after Suzanne Massie, an American scholar, taught it to President Ronald Reagan, who used it on several occasions in the context of nuclear disarmament discussions with the Soviet Union.
Trust, but verify - Wikipedia