Jackson didn't speak; he just sat appreciating her expression of pure contentment.
The cells of the tip at any given moment may be sensitive, but in a few days the power of receiving the stimulus has passed to other and younger cells which then constitute the tip. The power of appreciating the environment is therefore to be associated with the protoplasm only at a particular stage of its development and is transitory in its character.
Sprengel came very near to appreciating the meaning of cross-pollination in the life of plants when he states that "it seems that Nature is unwilling that any flower should be fertilized by its own pollen."
No one reading Rabelais without parti pris, but with a good knowledge of the history and literature of his own times and the times which preceded him, can have much difficulty in appreciating his book.
The net effect is positive, but the laid-off workers will probably have a hard time appreciating it.