هشیاری و مراقبه

Again, it is possible to fail in many ways (for evil belongs to the class of the unlimited ... and good to that of the limited), while to succeed is possible only in one way (for which reason also one is easy and the other difficult—to miss the mark easy, to hit it difficult); for these reasons also, then, excess and defect are characteristic of vice, and the mean of virtue; For men are good in but one way, but bad in many. 

- Aristotle

پس شقاوت از راه‌های بسیاری ممکن است واقع شود (چه شر از شمار اموری است که حد و مرزی نمی‌شناسند و خیر از از شمار آنها که حد و مرز می‌شناسند) اما سعادت فقط از یک راه (به همین علت اولی آسان و دومی دشوار است ــ نزدن تیر به هدف آسان و زدنش دشوار است)؛ نیز به‌همین علت‌هاست که افراط و تفریط از عیوب است، و اعتدال از فضایل؛ چه انسان تنها یک راه برای خوب شدن دارد و بسیار راه برای بد شدن.

ــ ارسطو

On Mathematical Science and the Beautiful

Those who assert that the mathematical sciences say nothing of the beautiful or the good are in error. For these sciences say and prove a great deal about them; if they do not expressly mention them, but prove attributes which are their results or definitions, it is not true that they tell us nothing about them. The chief forms of beauty are order and symmetry and definiteness, which the mathematical sciences demonstrate in a special degree.

- Aristotle

Simplicity

It is simplicity that makes the uneducated more effective than the educated when addressing popular audiences. 

- Aristotle

Nature

In all things of nature there is something of the marvelous. 

- Aristotle

Poetry & History

Poetry is finer and more philosophical than history; for poetry expresses the universal, and history only the particular. 

- Aristotle