There is no limit to the power of the human mind. The more concentrated it is, the more power is brought to bear on one point

The remarkable thing about the human mind is its range of limitations.

A general limitation of the human mind is its imperfect ability to reconstruct past states of knowledge, or beliefs that have changed. Once you adopt a new view of the world (or of any part of it), you immediately lose much of your ability to recall what you used to believe before your mind changed.

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

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

Who would set a limit to the mind? Who would dare assert that we know all there is to be known?

There are no limitations to the mind except those we acknowledge. Both poverty and riches are the offspring of thought.

I am impressed by the great limitations of the human mind. How quick are we to learn, that is, to imitate what others have done or thought before. And how slow to understand, that is, to see the deeper connections. Slowest of all, however, are we in inventing new connections or even in applying old ideas in a new field.

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

Man is ignorant of the nature of his own being and powers. Even his idea of his limitations is based on experience of the past, and every step in his progress extends his empire. There is therefore no reason to assign theoretical limits to what he may be, or what he may do.

Human thought has no limit. At its risk and peril, it analyzes and dissects its own fascination. We could almost say that, by a sort of splendid reaction, it fascinates nature; the mysterious world surrounding us returns what it receives; it is likely that contemplators are contemplated.

MAN’S ONLY LIMITATION, within reason, LIES IN HIS DEVELOPMENT AND USE OF HIS IMAGINA­TION. He has not yet reached the apex of development in the use of his imaginative faculty. He has merely discovered that he has an imagination, and has commenced to use it in a very elementary way.

Our minds are finite, and yet even in these circumstances of finitude we are surrounded by possibilities that are infinite, and the purpose of human life is to grasp as much as we can out of the infinitude.

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