Courage is knowing what not to fear.

Some suggestions for you :

Thus our State, which is also yours, will be a reality, and not a dream only, and will be administered in a spirit unlike that of other States, in which men fight with one another about shadows only and are distracted in the struggle for power, which in their eyes is a great good.

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.

Wonder is the feeling of the philosopher, and philosophy begins in wonder.

The evil never attains to any real friendship, either with good or evil.

The untrained mind keeps up a running commentary, labelling everything, judging everything. Best to ignore that commentary. Don't argue or resist, just ignore. Deprived of attention and interest, this voice gets quieter and quieter and eventually just shuts up.

You can discover more about a person in an hour of play than in a year of conversation.

Men say that we ought not to enquire into the supreme God and the nature of the universe, nor busy ourselves in searching out the causes of things, and that such enquiries are impious; whereas the very opposite is the truth.

Let no one destitute of Geometry enter my doors.

Love is a great spirit. Everything spiritual is in between god and mortal.

He is divine -- but then I call all philosophers that.

The first and best victory is to conquer self. To be conquered by self is, of all things, the most shameful and vile.

It is clear to everyone that astronomy at all events compels the soul to look upwards, and draws it from the things of this world to the other.

When a person supposes that he knows, and does not know; this appears to be the great source of all the errors of the intellect.

No one is more hated than he who speaks the truth.