“Sufficiently simple natural structures are predictable but uncontrollable, whereas sufficiently complex symbolic descriptions are controllable but unpredictable.”
“Literature is not exhaustible, for the sufficient and simple reason that a single book is not.”
“Descriptions and analyses of what exists are important but certainly not sufficient. We also need to understand what could be.”
“For a Westerner, it is usually sufficient for a proposition to be logically sound. For a Chinese it is not sufficient that a proposition be logically correct, but it must be at the same time in accord with human nature.”
“Such simple instincts as bees making a beehive could be sufficient to overthrow my whole theory.”
“Therefore the sufficiency of contentment is an enduring and unchanging sufficiency.”