“One has no right to love or hate anything if one has not acquired a thorough knowledge of its nature. Great love springs from great knowledge of the beloved object, and if you know it but little you will be able to love it only a little or not at all.”

“Iron rusts from disuse, stagnant water loses its purity, and in cold weather becomes frozen; even so does inaction sap the vigors of the mind.”

“once you have tasted the taste of sky, you will forever look up”

“Intellectual passion drives out sensuality. ”

“Many have made a trade of delusions and false miracles, deceiving the stupid multitudes.”

“All our knowledge has its origin in our perceptions”

“The acquisition of knowledge is always of use to the intellect, because it may thus drive out useless things and retain the good. For nothing can be loved or hated unless it is first known.”