There is no greater impediment to the advancement of knowledge than the ambiguity of words. To this chiefly it is owing that we find sects and parties in most branches of science [and politics]; and disputes that are carried on from age to age, without being brought to issue.
Interpretation
Ambiguity in language hinders our understanding and progress in knowledge and leads to persistent disputes.
In this quote, Thomas Reid argues that unclear language is a significant barrier to the advancement of knowledge. He suggests that the ambiguity of words produces confusion, which gives rise to divisions among people in various fields, including science and politics, resulting in unresolved disputes that can endure for generations.
In practice
In a speech about the importance of clear communication in science.
The laws of nature are the rules according to which the effects are produced; but there must be a cause which operates according to these rules. The laws of navigation never navigated a ship. The rules of architecture never built a house.
It appears evident, therefore, that those actions only can truly be called virtuous, and deserving of moral approbation, which the agent believed to be right, and to which he was influenced, more or less, by that belief.
Every indication of wisdom, taken from the effect, is equally an indication of power to execute what wisdom planned.
Marijuana gives rise to insanity -- not in its users but in the policies directed against it. A nation that sentences the possessor of a single joint to life imprisonment without parole but sets a murderer free after perhaps six years is in the grips of a deep psychosis.
And they can appreciate, through personal experience, that the really decisive battleground of American freedom is in the hearts and minds of our own people... Each day we must ask that Almighty God will set and keep His protecting hand over us so that we may pass on to those who come after us the heritage of a free people, secure in their God-given rights and in full control of a Government dedicated to the preservation of those rights.
In a capitalist society, all human relationships are voluntary. Men are free to cooperate or not, to deal with one another or not, as their own individual judgments, convictions and interests dictate.
Libraries can take the place of God.
In real life, coincidences happen all the time. In novels, they are leapt upon with fury.
The testimony of scripture is so plain that to add anything were superfluous, were it not that the world is almost now come to that blindness, that whatsoever pleases not the princes and the multitude, the same is rejected as doctrine newly forged, and is condemned for heresy.
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