The only barrier to human development is ignorance, and this is not insurmountable.

It is difficult to say what is impossible, for the dream of yesterday is the hope of today and the reality of tomorrow.

Every vision is a joke until the first man accomplishes it; once realized, it becomes commonplace.

It is difficult to say what is impossible, for the dream of yesterday is the hope of today and the reality of tomorrow.

It is difficult to say what is impossible, for the dream of yesterday is the hope of today and the reality of tomorrow.

To err is human; to blame it on the other guy is even more human.