Quote by Wilhelm Johannsen

"Genetics is the science of heredity, and heredity is the fundamental principle of life."

"The gene is the unit of heredity, but it is not the unit of evolution."

"Nature does nothing suddenly, and gradualism is the law of change."

"Pure lines are the foundation of scientific breeding."

"Success comes to those who never give up."

"Success is measured by happiness, not money."

"You make your own luck in this world."

"You have to be organized to be successful in anything."