I recently reread R' Schwab's "Letter Regarding the Frankfurt Approach." It is so beautifully written, so wise and humble. Then today I came across this quote from Goethe and it made me think of R' Schwab.
"If any man wish to write in a clear style, let him be first clear in his thoughts; and if any would write in a noble style, let him first possess a noble soul." Johann Wolfgang von Goethe