Fortune never comes twice.

What it means

An opportunity looks permanent until the moment it's gone. Whatever chance is in front of you now may not come back, so treat it that way.

Ndebele · Southern Africa

Source and context

From: Ndebele, Southern Africa

Source: Ndebele proverb (Inhlanhla kayiphindwa kabili); documented in Pelling, "Ndebele Proverbs and Other Sayings" (Mambo Press, 1977)

The meaning given here is our own reading. Other interpretations exist.