“The key to understanding the future is one word: sustainability.”

“… one can still say that quantum mechanics is the key to understanding magnetism. When one enters the first room with this key there are unexpected rooms beyond, but it is always the master key that unlocks each door.”

“Education is the result of self-learning, being taught by one or more people. Learning is the key word here. Schools, colleges and universities only divide you into CLASSES according to your level of understanding.”

“They never noticed the one who, silently, sustained this story, chose the future, set the guidelines for their memories and desires.”

“Memories are the key not to the past, but to the future.”

“The key to the understanding and to the full comprehension of all that the Prophets have said is found in the knowledge of the figures, their general ideas, and the meaning of each word they contain.”

“Love was the key to understanding all of the mysteries.”

“Nor attempt the Future’s portal with the Past’s blood-rusted key.”

“But love, I've come to understand, is more than three words mumbled before bedtime. Love is sustained by action, a pattern of devotion in the things we do for each other every day.”

“Words are your business, boy. Not just the word. Words are everything. The key to the rock, the answer to the question.”