All necessary truth is its own evidence.
Interpretation
Truth is self-evident and does not require external validation.
Ralph Waldo Emerson's quote suggests that inherent truths carry their own validity and do not need external proof or justification. This reflects a philosophical stance that recognizes the intuitive understanding of certain truths that resonate deeply within us without the need for corroboration from others.
In practice
In a speech about critical thinking, one could reference this quote to emphasize the importance of recognizing self-evident truths.
It is plain that there is no separate essence called courage, no cup or cell in the brain, no vessel in the heart containing drops or atoms that make or give this virtue; but it is the right or healthy state of every man, when he is free to do that which is constitutional to him to do.
Few people have any next, they live from hand to mouth without a plan, and are always at the end of their line.
Men cease to interest us when we find their limitations
Tis the good reader that makes the good book; a good head cannot read amiss: in every book he finds passages which seem confidences or asides hidden from all else and unmistakeably meant for his ear.
The world belongs to the energetic.
Hast thou named all the birds without a gun?
Thus we never see the true state of our condition till it is illustrated to us by its contraries, nor know how to value what we enjoy, but by the want of it.
We are governed, our minds are molded, our tastes formed, our ideas suggested, largely by men we have never heard of. This is a logical result of the way in which our democratic society is organized. Vast numbers of human beings must cooperate in this manner if they are to live together as a smoothly functioning society.
A consciousness of wrongdoing is the first step to salvation...you have to catch yourself doing it before you can correct it.
Every phenomenon of nature was a word, - the sign, symbol and pledge of a new, mysterious, inexpressible but all the more intimate union, participation and community of divine energies and ideas.
I and my public understand each other very well: it does not hear what I say, and I don't say what it wants to hear.
Not believe in Santa Claus! You might as well not believe in fairies!
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