The cell is immortal. It is merely the fluid in which it floats that degenerates. Renew this fluid at regular intervals, give the cells what they require for nutrition, and as far as we know, the pulsation of life can go on forever.
Alexis CarrelDiscipline brings us effort, sacrifice and suffering. Later it brings us something of an inestimable value: something of which those who live only for pleasure, profit or amusement will always be deprived. This peculiar indefinable joy which one must have felt oneself to understand is the sign with which life marks its moment of triumph.
Alexis Carrel