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

Both poverty and riches are the offspring of thought.

There are no constraints on the human mind, no walls around the human spirit, no barriers to our progress except those we ourselves erect.

All things are to be examined and called into question. There are no limits set to thought.

Personally, I do not believe the human mind has any limits but those we impose ourselves.

Imagination... its limits are only those of the mind itself.

There are no such things as limits to growth, because there
are no limits to the human capacity for intelligence,
imagination, and wonder.

Your mind is infinite, it's your doubts that are limiting.

One cannot prevent people from thinking what they please.

Neither nature, experience, nor probability informs these lists of "entitlements", which are subject to no constraints except those of the mind and appetite of their authors.

That we may accept a limitation on our actions but never, under no circumstances, must we accept restriction on our thinking.

The garden of the world has no limits, except in your mind.

Thought must be free to range as it likes over all phenomena and philosophy, unhampered by compulsions. A man cannot be bludgeoned by vulgar threats of damnation, into accepting that what other people say is true.

The mind is a malleable tool, none of your thoughts are fixed.