The being cannot be termed rational or virtuous, who obeys any authority, but that of reason.
Mary Wollstonecraft

The development of a rational view of the nature of catalysis was thus absolutely dependent on the creation of the concept of the rate of chemical reaction.
Wilhelm Ostwald

The first and most optimistic response was complete rational expectations econometrics. A rational expectations equilibrium is a likelihood function. Maximize it.
Thomas J. Sargent

The human race will then become one family, and the world will be the dwelling of Rational Men.
Adam Weishaupt

The lived experiences which could not find adequate scientific expression in the substance doctrine of rational psychology were now validated in light of new and better methods.
Wilhelm Dilthey

The meme for blind faith secures its own perpetuation by the simple unconscious expedient of discouraging rational inquiry.
Richard Dawkins

The more rational an institution is the less it suffers by making concessions to others.
George Santayana

The movie business is very much like that: people in authority making purely emotional decisions instead of interesting rational ones.
Bill Forsyth

The obsession required to see a feature through from concept to release is not a rational thing to do with your brief time on this planet. Nor is it something to which an intelligent person should aspire.
Yahoo Serious

The only reason of the institution of civil government; and the only rational ground of submission to it, is the common safety and utility.
Jonathan Mayhew

The rational man finds that his share of the cost of the wastes he discharges into the commons is less than the cost of purifying his wastes before releasing them.
Garrett Hardin

The rational mind of man is a shallow thing, a shore upon a continent of the irrational, wherein thin colonies of reason have settled amid a savage world.
Wilford O. Cross

The task of a university is the creation of the future, so far as rational thought and civilized modes of appreciation can affect the issue.
Alfred North Whitehead

There is no rational reason to doubt that the universe has existed indefinitely, for an infinite time. It is only myth that attempts to say how the universe came to be, either four thousand or twenty billion years ago.
Hannes Alfven

There's no evidence whatsoever that men are more rational than women. Both sexes seem to be equally irrational.
Albert Ellis

Throughout the whole vegetable, sensible, and rational world, whatever makes progress towards maturity, as soon as it has passed that point, begins to verge towards decay.
Robert Blair

To be bothered wherever you go - it's not a rational thing to want at all.
Colin Firth

TO fear God, is one of the first and greatest Duties of his rational Creatures.
Charles Inglis

To him who looks upon the world rationally, the world in its turn presents a rational aspect. The relation is mutual.
Georg Wilhelm Friedrich Hegel

To say that man is a reasoning animal is a very different thing than to say that most of man's decisions are based on his rational process. That I don't believe at all.
Rex Stout