Immaturity is the incapacity to use one's intelligence without the guidance of another.
Intelligence recognizes what has happened. Genius recognizes what will happen.
There are only two races on this planet - the intelligent and the stupid.
To educate the intelligence is to expand the horizon of its wants and desires.
Play is the only way the highest intelligence of humankind can unfold.
It's a poor sort of memory that only works backwards.
Genius always finds itself a century too early.
Intelligence without ambition is a bird without wings.
Whatever debases the intelligence degrades the entire human being.
It is the province of knowledge to speak, and it is the privilege of wisdom to listen.
Knowledge without justice ought to be called cunning rather than wisdom.
We in the press, by our power, can actually undermine leadership.
Problems are only opportunities in work clothes.
Innovation distinguishes between a leader and a follower.
He who is prudent and lies in wait for an enemy who is not, will be victorious.
One must be convinced to convince, to have enthusiasm to stimulate the others.
Life isn't easy, and leadership is harder still.
I never lied to a person in my life; my kids didn't, either.
The guiding motto in the life of every natural philosopher should be, seek simplicity and distrust it.
Always remember that better days are ahead - if not in this life, in the next.
'Tis the set of the sail that decides the goal, and not the storm of life.