"It" is here the neutral pronoun; it is used in a grammatical turn called "extraposition of a subject clause" (Quirk, A Comprehensive Grammar of the English Language, § 2.59 Grammatical highlighting).
The role of the anticipatory pronoun "it" […] is essentially a structural one in the sense that it carries virtually no information in itself, but merely
supplies the structural requirement for an initial subject. (Its semantic
function, in so far as it has one, is merely to signal that the content of the
subject is expressed in a later position in the same sentence.) A somewhat
parallel role is performed by the introductory word "there" in EXISTENTIAL
The usual form is as follows, where "to have recourse to such things at times" is the subject clause.
- Therefore, to have recourse to such things at times becomes a wise and virtuous man.
(OALD) become verb [transitive, no passive] (not used in the progressive tenses)
become somebody (formal) to be suitable for somebody
• Such behaviour did not become her.