A woman without a man cannot meet a man, any man, of any age, without thinking, even if it’s for a half-second, Perhaps this is the man.

The line wryly captures how social conditioning and romantic expectation can intrude on perception. Lessing suggests that when a woman is “without a man” (single, unattached, or socially defined as lacking a partner), even an ordinary encounter is briefly filtered through the possibility of rescue, completion, or destiny—“Perhaps this is the man.” The half-second matters: it implies the thought is automatic, almost involuntary, and not necessarily endorsed by the woman’s conscious values. The quote critiques a culture that frames heterosexual coupling as a default goal and measures women’s status by attachment, turning men into potential solutions rather than simply people.