"The human mind is a wonderful thing, and it is capable of doing wonders."

"The lecturer should give the audience full reason to believe that all his powers have been exerted for their pleasure and instruction."

"I am working on the conversion of magnetism into electricity, and I have every hope of success."

"The greatest error is to believe that one knows everything."

"The five essential entrepreneurial skills for success are concentration, discrimination, organization, innovation and communication."