| CAS No.: | 6 |
|---|---|
| Formula: | 7 |
| EINECS: | 5 |
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Blue is derived from indigo, but it is bluer than indigo; ice is made of water, but it is colder than water. A piece of wood is straight as a rope, and when it is bent into a wheel, its curve is in the same direction as a circle. Even if it is dry and violent and no longer straight, it is bent so that it is straight. Therefore, wood is straight when it is tied with a rope, and metal is sharp when it is sharpened. A gentleman is knowledgeable and examines himself every day, so he will know and act without mistakes.
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