Minds ripen at very different ages.
Source: Letter to Mrs. William Robinson, her sister-in-law,The Letters of Mrs. Elizabeth Montagu, 1810-1813 .
-- Elizabeth Montagu, (Oct 2 1720-1800), English intellectual, conversationalist; She was one of the first Bluestockings, English women who organized conversation evenings to find a more worthy pastime than card playing.