The true spirit of delight, the exaltation, the sense of being more than Man, which is the touchstone of the highest excellence, is to be found in mathematics as surely as in poetry.

Love and art are the two wings that lift the soul to heaven.

You have to believe in yourself when no one else does.

Success is a series of small victories.

可持续性不是一种选择；它是农业前进的唯一道路。