Man is an animal which, alone ...

Man is an animal which, alone among the animals, refuses to be satisfied by the fulfillment of animal desires.
Man is an animal which, alone among the animals, refuses to be satisfied by the fulfillment of animal desires.
 Alexander Graham Bell

More phrases

Effort only fully releases its reward after a person refuses to quit.
Never complain and never explain.
A good plan violently executed now is better than a perfect plan executed next week.
 George S. Patton
Problems are not stop signs, they are guidelines.
 Robert Schuller
Never give up, for that is just the place and time that the tide will turn.
 Harriet Beecher Stowe

Quotes from the same author

When one door closes, another opens; but we often look so long and so regretfully upon the closed door that we do not see the one which has opened for us.
 Alexander Graham Bell
What this power is I cannot say; all I know is that it exists and it becomes available only when a man is in that state of mind in which he knows exactly what he wants and is fully determined not to quit until he finds it.
 Alexander Graham Bell
What this power is, I cannot say... All I know is that it exists.
 Alexander Graham Bell
The only difference between success and failure is the ability to take action.
 Alexander Graham Bell
I have heard articulate speech produced by sunlight I have heard a ray of the sun laugh and cough and sing! … I have been able to hear a shadow, and I have even perceived by ear the passage of a cloud across the sun's disk.
 Alexander Graham Bell