Sorrow makes us all children ...

Sorrow makes us all children again - 
destroys all differences of intellect.  
The wisest know nothing.
Sorrow makes us all children again - destroys all differences of intellect. The wisest know nothing.

Quotes from the same author

Thought is the blossom; language the bud; action the fruit behind it.
The invariable mark of wisdom is to see the miraculous in the common.
Our distrust is very expensive.
Wisdom has its root in goodness, not goodness its root in wisdom.
Do not follow where the path may lead. Go, instead, where there is no path and leave a trail.