The attempt to devote oneself to literature alone is a most deceptive thing, and often, paradoxically, it is literature that suffers for it. Václav Havel
To devote oneself to vigilance when the enemy is an imaginary one is idle, and to congratulate oneself for looking long and well for a foe that is not coming is foolish and sinful. My life has been a waste. Robert Silverberg
One has to devote oneself to a particular pursuit. To be successful at anything, you have to make a total commitment to it. Donald Johanson