The heart was always seen as the noblest of the internal organs as well as the most vital. The hearts of martyrs or future candidates for sainthood would be preserved, but never their livers, say, or the entrails – at least not on their own; it was either the heart by itself or the whole lot together.
In every tragedy, an element of comedy is preserved. Comedy is just tragedy reversed.
Poetry is adolescence fermented, and thus preserved.
The absence of the heavy boot of Europe has preserved to these people the agile walk of the wild animal, while the general simplicity of their lives has given them many other points of physical perfection.
In reality, the past is preserved by itself automatically.