"Here, take a cigar," returned the father immediately, coming in to rarefy the atmosphere.
"A Canadian Bankclerk"
J. P. Buschlen
Therefore if it desired to remain in the air it is necessary that it should blend with a quantity of air, and if it were united with the air, two difficulties arise: that is, that it will rarefy that portion of air with which it is mingled, and this rarefied air will fly upwards and will not remain in the air which is heavier than itself; and besides this the ethereal spiritual essence is disunited, and its nature is changed, for which reason that nature loses some of its first virtue.
"Thoughts on Art and Life"
Leonardo da Vinci
Thou mayst change the thoughts into new forms; thou mayst rarefy and sublimate it into a finer spirit,-but thou canst not annihilate that which has no home but in the memory, no substance but the idea.
"Zanoni"
Edward Bulwer Lytton