All the knowledge I possess everyone can acquire, but my heart is all my own. -Goethe.

Each one sees what he carries in his heart

A wounded heart can with difficulty be cured. [Ger., Doch ein gekranktes Herz erholt sich schwer.]

Only the heart without a stain knows perfect ease. [Ger., Ganz unbefleckt geniesst sich nur das Herz.]

My peace is gone, my heart is heavy. [Ger., Meine Ruh ist hin, Mein Herz ist schwer.]

The heart of a fool is in his mouth, but the mouth of the wise man is in his heart. -Benjamin Franklin.