“There are no limitations to the mind except those that we acknowledge.”

“Imagination… its limits are only those of the mind itself.”

“It's one of those secrets that's embarrassing to acknowledge, but we do love our students.”

“Human relationships are patterned and cross-patterned and restricted and limited and de-limited and caged and freed again by the elaborate conventions, rules, and games we call Civilisation … the rules and the games are often absurd and farcical -- sometimes they are tragic -- yet we tacitly acknowledge that they are necessary.”

“After knowing that the sun neither sets nor rises except for our imaginations and the limitations of our planet Earth, there can be no more mood swings in the heart and mind.”

“Your only limitations are those you set up in your mind, or permit others to set up for you.”

“The essence of the problem is that once we begin to allow exceptions for special interests, we move from a system of private arrangements to a political system where everyone’s freedom is limited and government becomes a matter of trying to balance those interests. Nobody really wins under these terms.”

“The only limitations are those which we impose upon ourselves.”

“Life has no limitations, except the ones you make.”

“We do have to use our minds as far as they will take us, yet acknowledging that they cannot take us all the way.”