What i say is easy to know, easy to do. The world does not know, no one does.
-> do you know? are you doing without doing?
What i say have principle, what i do have basis. People do not know, therefore do not understand me.
-> seemingly random speeches have their meanings; seemingly random actions have their purposes. Do you understand Laozi?
Understand me are few, follow me are precious.
-> When you understand, are you putting your understanding in action, like Laozi did?
Therefore saints wear coarse clothes but hold jade.
-> Why? Because saints (Daoist enlightened being) can look like a normal person living a normal life, while living with wisdom and everlasting peace. Who say saints can only be found in temple or in the mountain?
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Discussion of Chapter 70:
What is principle? What is basis? It is the universal flow devoid of yet inclusive of the self. Paradox? Yes, it is, to the self. How to overcome? Go beyond your self by fully embracing and mastering it! When we progress, the self become quieter and quieter, and one begins to identify with the non-personal greater field of consciousness and awareness, which is underneath the self and is not subject to the limitation of separated and personal self. When this is realized, life becomes easy to know, and to do.
Bilingual version of Ch70: https://www.lisiming.net/chinese-philosophy/daoist/daoist-philosophy/dao-de-jing-core-33-chapters/ddj55-79/