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Excerpt from Chapter 67
一曰慈二曰儉三曰不敢為天下先 is an excerpt from the 67th Chapter of Lao Tzu's (Lao Zi's) Te-Tao Ching (Dao De Jing).
This is the part where the three treasures are discussed. In English, we'd say these three treasures are compassion, frugality, and humility. Some may translate these as love, moderation, and lack of arrogance. I have also seen them translated as benevolence, modesty, and “Not presuming to be at the forefront in the world.” You can mix them up the way you want, as translation is not really a science but rather an art.
I should also explain that the first two treasures are single-character ideas, yet the third treasure was written out in six characters (there are also some auxiliary characters to number the treasures).
If Lao Tzu's words are important to you, then a wall scroll with this passage might make a great addition to your home.