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Danh ngôn của Plato (Sứ mệnh: 1)

Knowledge which is acquired under compulsion obtains no hold on the mind.
At the touch of love everyone becomes a poet.
One of the penalties for refusing to participate in politics is that you end up being governed by your inferiors.
Thinking: the talking of the soul with itself.
Nothing can be more absurd than the practice that prevails in our country of men and women not following the same pursuits with all their strengths and with one mind, for thus, the state instead of being whole is reduced to half.
Attention to health is life's greatest hindrance.
Courage is knowing what not to fear.
Courage is a kind of salvation.
Poetry is nearer to vital truth than history.
The first and greatest victory is to conquer yourself; to be conquered by yourself is of all things most shameful and vile.
Nothing in the affairs of men is worthy of great anxiety.
Music is a moral law. It gives soul to the universe, wings to the mind, flight to the imagination, and charm and gaiety to life and to everything.
The greatest wealth is to live content with little.
Knowledge without justice ought to be called cunning rather than wisdom.
Cunning... is but the low mimic of wisdom.
All men are by nature equal, made all of the same earth by one Workman; and however we deceive ourselves, as dear unto God is the poor peasant as the mighty prince.
The learning and knowledge that we have, is, at the most, but little compared with that of which we are ignorant.
The beginning is the most important part of the work.
There are two things a person should never be angry at, what they can help, and what they cannot.
We can easily forgive a child who is afraid of the dark; the real tragedy of life is when men are afraid of the light.
Knowledge is true opinion.
Democracy passes into despotism.
It is right to give every man his due.
He who is of calm and happy nature will hardly feel the pressure of age, but to him who is of an opposite disposition youth and age are equally a burden.
When men speak ill of thee, live so as nobody may believe them.
Let parents bequeath to their children not riches, but the spirit of reverence.
Excess generally causes reaction, and produces a change in the opposite direction, whether it be in the seasons, or in individuals, or in governments.
Democracy... is a charming form of government, full of variety and disorder; and dispensing a sort of equality to equals and unequals alike.
When the tyrant has disposed of foreign enemies by conquest or treaty, and there is nothing more to fear from them, then he is always stirring up some war or other, in order that the people may require a leader.
They certainly give very strange names to diseases.
The most important part of education is proper training in the nursery.
We ought to fly away from earth to heaven as quickly as we can; and to fly away is to become like God, as far as this is possible; and to become like him is to become holy, just, and wise.
No one knows whether death, which people fear to be the greatest evil, may not be the greatest good.
Must not all things at the last be swallowed up in death?
Whatever deceives men seems to produce a magical enchantment.
We are twice armed if we fight with faith.
Ignorance of all things is an evil neither terrible nor excessive, nor yet the greatest of all; but great cleverness and much learning, if they be accompanied by a bad training, are a much greater misfortune.
Love is a serious mental disease.
Love is the joy of the good, the wonder of the wise, the amazement of the Gods.
There are three classes of men; lovers of wisdom, lovers of honor, and lovers of gain.
For the introduction of a new kind of music must be shunned as imperiling the whole state; since styles of music are never disturbed without affecting the most important political institutions.
Music is the movement of sound to reach the soul for the education of its virtue.
Rhetoric is the art of ruling the minds of men.
Wisdom alone is the science of other sciences.
Philosophy is the highest music.
Good people do not need laws to tell them to act responsibly, while bad people will find a way around the laws.
A hero is born among a hundred, a wise man is found among a thousand, but an accomplished one might not be found even among a hundred thousand men.
The man who makes everything that leads to happiness depends upon himself, and not upon other men, has adopted the very best plan for living happily. This is the man of moderation, the man of manly character and of wisdom.
Science is nothing but perception.
There will be no end to the troubles of states, or of humanity itself, till philosophers become kings in this world, or till those we now call kings and rulers really and truly become philosophers, and political power and philosophy thus come into the same hands.
Justice in the life and conduct of the State is possible only as first it resides in the hearts and souls of the citizens.
The measure of a man is what he does with power.
Knowledge becomes evil if the aim be not virtuous.
Life must be lived as play.
Opinion is the medium between knowledge and ignorance.
If a man neglects education, he walks lame to the end of his life.
Human behavior flows from three main sources: desire, emotion, and knowledge.
The direction in which education starts a man will determine his future in life.
Death is not the worst that can happen to men.
Better a little which is well done, than a great deal imperfectly.
No one is a friend to his friend who does not love in return.
We do not learn; and what we call learning is only a process of recollection.
No man should bring children into the world who is unwilling to persevere to the end in their nature and education.
He who steals a little steals with the same wish as he who steals much, but with less power.
I would fain grow old learning many things.
No evil can happen to a good man, either in life or after death.
Justice means minding one's own business and not meddling with other men's concerns.
One man cannot practice many arts with success.
Our object in the construction of the state is the greatest happiness of the whole, and not that of any one class.
Twice and thrice over, as they say, good is it to repeat and review what is good.
Truth is the beginning of every good to the gods, and of every good to man.
And what, Socrates, is the food of the soul? Surely, I said, knowledge is the food of the soul.
A good decision is based on knowledge and not on numbers.
There's a victory, and defeat; the first and best of victories, the lowest and worst of defeats which each man gains or sustains at the hands not of another, but of himself.
To prefer evil to good is not in human nature; and when a man is compelled to choose one of two evils, no one will choose the greater when he might have the less.
Entire ignorance is not so terrible or extreme an evil, and is far from being the greatest of all; too much cleverness and too much learning, accompanied with ill bringing-up, are far more fatal.
The blame is his who chooses: God is blameless.
Injustice is censured because the censures are afraid of suffering, and not from any fear which they have of doing injustice.
For good nurture and education implant good constitutions.
The rulers of the state are the only persons who ought to have the privilege of lying, either at home or abroad; they may be allowed to lie for the good of the state.
The punishment which the wise suffer who refuse to take part in the government, is to live under the government of worse men.
Then not only custom, but also nature affirms that to do is more disgraceful than to suffer injustice, and that justice is equality.
The god of love lives in a state of need. It is a need. It is an urge. It is a homeostatic imbalance. Like hunger and thirst, it's almost impossible to stamp out.