Of the blessings set before you make your choice, and be content. No man can taste the fruits of autumn while he is delighting his scent with the flowers of the spring: no man can, at the same time, fill his cup from the source and from the mouth of the Nile.
Samuel JohnsonThe mathematicians are well acquainted with the difference between pure science, which has only to do with ideas, and the application of its laws to the use of life, in which they are constrained to submit to the imperfections of matter and the influence of accidents.
Samuel Johnson