"Not only does common sense not exclude beauty, but it really aids in its inception and protects its growth by maintaining the reasons which produced its appearance.
"Without it, the reign of the most admired things would be of short duration, granting that the want of logic had not prevented their production.
"What is there more commendable than the love of work, devotion to science, ambition to succeed?
"Could all this exist if common sense did not intervene to permit the development of the deductions on which are based the resolutions that inspired in us these aspirations.
"But this is not all; without logic, which permits us to give them solidity, the most serious resolutions would soon become nothing but vague projects, shattered as soon as formed.
"In common sense lies the cause and the object of things.
"It is common sense which makes us realize that difference that few persons are willing to analyze, and which lies between judgment and opinion.
"We almost always succeed in readily confounding them, and from this mistake results a too-frequent cause of failures.
"Opinion is a conviction which is capable of modification.
"In addition to this, as it is based on mere indications and probability, it is rarely free from the personal element.