§453. Infinitive Mood

Rarely the Infinitive is used exactly like the Accusative of a noun:—

• beātē vīvere aliī in aliō, vōs in voluptāte pōnitis (Fin. 2.86), a happy life different [philosophers] base on different things, you on pleasure.
• quam multa ... facimus causā amīcōrum, precārī ab indīgnō, supplicāre, etc. (Lael. 57), how many things we do for our friends' sake, ask favors from an unworthy person, resort to entreaty, etc.
• nihil explōrātum habeās, nē amāre quidem aut amārī (id. 97), you have nothing assured, not even loving and being loved.

Infinitive as Apparent Subject of Impersonals