Who said "The softest thing in the world rides down the hardest."?

Lao Tzu (6th century BC). Source: Tao Te Ching 43.

What is the original Chinese?

天下之至柔，馳騁天下之至堅。. Translated from the original Chinese by Spartan Surfers.

The softest thing in the world rides down the hardest.

Lao Tzu, Tao Te Ching 43

The source

"The softest thing in the world rides down the hardest." Lao Tzu said it in Tao Te Ching 43. Translated from the original Chinese by Spartan Surfers.

"天下之至柔，馳騁天下之至堅。"

Original Chinese, Tao Te Ching 43. Chinese: Wang Bi edition via zh.wikisource.

Who said it

Lao Tzu (6th century BC). Keeper of the archives at the Zhou court, by tradition the author of the Tao Te Ching: eighty-one short chapters on water, softness and knowing when to stop.

Questions

Who said "The softest thing in the world rides down the hardest."?: Lao Tzu (6th century BC). Source: Tao Te Ching 43.
What is the original Chinese?: 天下之至柔，馳騁天下之至堅。. Translated from the original Chinese by Spartan Surfers.