Hold your powers together for something good and let everything go that is for you without result and is not suited to you.
Ah! my poor brain is racked and crazed, My spirit and senses amazed!
Unrest and uncertainty are our lot.
In the end we retain from our studies only that which we practically apply.
Only the heart without a stain knows ease.
Whoever gives himself up to solitude, Ah! he is soon alone.