Just like the roots of a mangrove tree

A friend was telling me in her e-mail, "I saw a mangrove tree at the Botanic Garden and was reminded of the mangroves we saw at the Singapore Botanic Garden. Those are the trees that drop roots from the branches so they grow both up to the sky and down into the ground. Do you remember them?"

I told her I love the way she described how the roots of mangrove drop from the branches - "so they grow both up to the sky and down into the ground".

It sounds very much like what we humans are supposed to do as well - to grow both up to the sky and down into the ground.