“Knowledge is simply a kind of fuel; it needs the motor of understanding to convert it into power.”

“Without inspiration the best powers of the mind remain dormant. There is a fuel in us which needs to be ignited with sparks.”

“The end and aim of spying in all its five varieties is knowledge of the enemy; and this knowledge can only be derived, in the first instance, from the converted spy. Hence it is essential that the converted spy be treated with the utmost liberality.”

“Without power, knowledge is useless. without knowledge, faith is tyranny. Without understanding, humanity is blind, and without all four, it is doomed.”

“Your emotional capacity is an empty motor, and your values are the fuel with which your mind fills it. If you choose a mix of contradictions, it will clog your motor, corrode your transmission and wreck you on your first attempt to move with a machine which you, the driver, have corrupted.”

“But need alone is not enough to set power free: there must be knowledge.”