Mahmā acts as a general conditional expression. Takun is an incomplete verb; min khalīqatin specifies the kind of quality under discussion. Khāla means “supposed” or “imagined,” while the passive tuʿlami gives the final outcome: it becomes known.
The line does not claim immediate access to another person’s inner life. It presents conduct over time as evidence of a settled disposition, even if the individual hopes that it can stay hidden.