The happiness of your life depends upon the quality of your thoughts: therefore, guard accordingly, and take care that you entertain no notions unsuitable to virtue and reasonable nature.
Where so many hours have been spent in convincing myself that I am right, is there not some reason to fear I may be wrong?
Because the heart beats under a covering of hair, of fur, feathers, or wings, it is, for that reason, to be of no account?
Man: a reasoning rather than a reasonable animal.
I have one request: may I never use my reason against truth.
A few observation and much reasoning lead to error; many observations and a little reasoning to truth.
Those who will not reason, are bigots, those who cannot, are fools, and those who dare not, are slaves.
A time will come when a politician who has wilfully made war and promoted international dissension will be as sure of the dock and much surer of the noose than a private homicide. It is not reasonable that those who gamble with men's lives should not stake their own.
Because the heart beats under a covering of hair, of fur, feathers, or wings, is it, for that reason, to be of no account?
The belly is the reason why man does not mistake himself for a god.
We are usually convinced more easily by reasons we have found ourselves than by those which have occurred to others.
Many a man fails to become a thinker for the sole reason that his memory is too good.
If you want something really important to be done you must not merely satisfy the reason, you must move the heart also.
The reason there are so few female politicians is that it is too much trouble to put makeup on two faces.
The Lord prefers common-looking people. That is the reason He makes so many of them.
Reason often makes mistakes, but conscience never does.
One ought, every day at least, to hear a little song, read a good poem, see a fine picture and, if it were possible, speak a few reasonable words.
Omit needless words. Vigorous writing is concise. A sentence should contain no unnecessary words, a paragraph no unnecessary sentences, for the same reason that a drawing should have no unnecessary lines and a machine no unnecessary parts.
The reasonable man adapts himself to the world; the unreasonable one persists in trying to adapt the world to himself. Therefore all progress depends on the unreasonable man.
Whenever you commend, add your reasons for doing so; it is this which distinguishes the approbation of a man of sense from the flattery of sycophants and admiration of fools.
The question is not can they reason? Nor can they talk? But can they suffer?
The decent moderation of today will be the least of human things tomorrow. At the time of the Spanish Inquisition, the opinion of good sense and of the good medium was certainly that people ought not to burn too large a number of heretics; extreme and unreasonable opinion obviously demanded that they should burn none at all.
To announce that there must be no criticism of the President, or that we are to stand by the President, right or wrong, is not only unpatriotic and servile, but is morally treasonable to the American public.
People hate as they love, unreasonably.
I do not feel obliged to believe that the same God who has endowed us with sense, reason, and intellect has intended us to forgo their use.