Just as food eaten without appetite is a tedious nourishment, so does study without zeal damage the memory by not assimilating what it absorbs.
Intellectual passion drives out sensuality.
I have from an early age abjured the use of meat, and the time will come when men such as I will look upon the murder of animals as they now look upon the murder of men.
The knowledge of all things is possible
Once you have tasted flight, you will forever walk the earth with your eyes turned skyward, for there you have been, and there you will always long to return.
Anyone who conducts an argument by appealing to authority is not using his intelligence he is just using his memory.
Just as courage is the danger of life, so is fear its safeguard.
To such an extent does nature delight and abound in variety that among her trees there is not one plant to be found which is exactly like another; and not only among the plants, but among the boughs,...
The natural desire of good men is knowledge.
The noblest pleasure is the joy of understanding.
The smallest feline is a masterpiece.
Nature never breaks her own laws.
While I thought that I was learning how to live, I have been learning how to die.
The human foot is a masterpiece of engineering and a work of art.
I love those who can smile in trouble, who can gather strength from distress, and grow brave by reflection. 'Tis the business of little minds to shrink, but they whose heart is firm, and whose conscie...
It's easier to resist at the beginning than at the end.
Obstacles cannot crush me every obstacle yields to stern resolve.
If you are alone you belong entirely to yourself. If you are accompanied by even one companion you belong only half to yourself or even less in proportion to the thoughtlessness of his conduct and if...
The function of muscle is to pull and not to push, except in the case of the genitals and the tongue.
Painting is poetry that is seen rather than felt, and poetry is painting that is felt rather than seen.