Earl Nightingale was an American motivational speaker and author known for his work in personal development and self-help. His most famous recording, "The Strangest Secret," emphasized the power of positive thinking and goal setting. Nightingale's teachings and recordings have inspired countless individuals to pursue personal and professional growth.

"Learn to enjoy every minute of your life. Be happy now. Don't wait for something outside of yourself to make you happy in the future. Think how really precious is the time you have to spend, whether it's at work or with your family. Every minute should be enjoyed and savored."

"You can measure opportunity with the same yardstick that measures the risk involved. They go together."

"Your world is a living expression of how you are using and have used your mind."

"The more intensely we feel about an idea or a goal, the more assuredly the idea, buried deep in our subconscious, will direct us along the path to its fulfillment."

"Our environment, the world in which we live and work, is a mirror of our attitudes and expectations."

"Always keep that happy attitude. Pretend that you are holding a beautiful fragrant bouquet."

"We can let circumstances rule us, or we can take charge and rule our lives from within."

"Wherever there is danger, there lurks opportunity; whenever there is opportunity, there lurks danger. The two are inseparable. They go together."