People of uncommon abilities generally fall into eccentricities when their sphere of life is not adequate to their abilities.
— Johann Wolfgang von Goethe

An attempt at visualizing the Fourth Dimension: Take a point, stretch it into a line, curl it into a circle, twist it into a sphere, and punch through the sphere.
Albert Einstein sphere quote

The power of man has grown in every sphere, except over himself.
— Winston Churchill

The pursuit of truth and beauty is a sphere of activity in which we are permitted to remain children all our lives.
— Albert Einstein

Nature is an infinite sphere of which the center is everywhere and the circumference nowhere.
— Blaise Pascal