Латынь актуальна всегда.

[olindom]

  "Errare humanum est, perseverare autem diabolicum." It translates to: "To err is human, but to persist [in error] is diabolical." The saying is often attributed to Seneca but not attested in his works

Ошибаться это по-человечески, но вот настаивать на этом (на ошибке) уже от дьявола. 

ad astra per aspera	to the stars through difficulties	Or, "a rough road leads to the stars", as on the Launch Complex 34 memorial plaque for the astronauts of Apollo 1; motto of the State of Kansas and other organisations
ad augusta per angusta	to rise to a high position overcoming hardships

Сквозь тернии к звездам.
К высотам через трудности.