Bitterness (n.) is a taste that outlives the original slight.
Bitterness (n.) is the crossroads of all extreme tastes.
Bitterness (n.) is sour sweetened from within; Bittersweet is sour sweetened from the outside.
Bitterness (n.) wrinkles our sense of taste. The tongue has to stretch out nimbly to straighten itself.
Flavor (n.) is described even by professionals in words borrowed from the other senses
Flavor (n.) cannot be recorded or photographed, so it survives only in the people who were there
Flavor (n.) is impossible without saliva — it desolves chemicals from the food into a liquid that the can be detected by receptors on taste bud.
Flavor (n.) is all about appetite — if one has eaten enough, bread becomes tasteless.
Salt (n.) is born of the purest parents: the sun and the sea.
Salt (n.) is so prevalent in the ocean that it would cover the earth 500ft deep . . .or flavor four cups of hot and sour soup.
Salt (n.) is the police of taste. The police protect the weak against the strong, and so does salt keep each of the various flavors of a course in place as much as possible, preventing the more prepossessing from taking over, restraining the stronger from dominating the weaker.
Sour (n.) is a fruit's way of saying not yet.
Sour (n.) keeps sweetness from becoming boring and gets none of the credit for it.
Sour (n.) is what fat needs in order to keep being eaten.
Sour (n.) is a warning from the tongue that grown people learn to order on purpose.