Paul Ehrlich

"Happiness is not something ready made. It comes from your own actions."

"The only way to do great work is to love what you do."

"In the midst of chaos, there is also opportunity."

"Kindness is a language which the deaf can hear and the blind can see."

"The best time to plant a tree was 20 years ago. The second best time is now."

"Your health is an investment, not an expense."

"Imagination is more important than knowledge."

"The only impossible journey is the one you never begin."

"In matters of science, speculation is a luxury we cannot afford."

"A single act of kindness throws out roots in all directions."

"The measure of intelligence is the ability to change."

"Truth is like the sun. You can shut it out for a time, but it ain't goin' away."

"Courage is resistance to fear, mastery of fear—not absence of fear."

"The greatest wealth is health."

"What we think, we become; what we feel, we attract; what we imagine, we create."

"Life is not measured by the number of breaths we take but by the moments that take our breath away."

"In every problem lies the seed of equal or greater opportunity."

"The pursuit of truth and beauty is a sphere of activity in which we are allowed to remain children all our lives."

"Do what you feel in your heart to be right, for you'll be criticized anyway."

"The only way to discover the limits of the possible is to go beyond them into the impossible."

"Patience is the companion of wisdom."

"The greatest crime is to remain indifferent in the face of injustice."

"In science, there is no authority, only evidence."

"Love is composed of a single soul inhabiting two bodies."

"The future is not something we enter; it is something we create."

"All that we are is the result of what we have thought."

"Health is a state of complete physical, mental and social well-being."

"The only true failure is the failure to try."

"In the pursuit of knowledge, speed is less important than direction."

"Every expert was once a beginner."