Stanislaw Lem

We owe our liberation to chemistry," he went on. "For all perception is but a change in the concentration of hydrogen ions on the surface of the brain cells. Seeing me, you actually experience a disturbance in the sodium-potassium equilibrium across your neuron membranes. So all we have todo is send a few well-chosen molecules down into those cortical mitochondria, activate the right neurohumoral-synaptic transmission effector sites, and your fondest dreams come true. But you knowall this," he concluded, subdued.

I never read to kill time. Killing time is like killing someone's wife or a child. There is nothing more precious for me than time.