Personal dignity is to be measured with the yardstick of one's conscience, not with that of other people's judgement. 
Your identity is like your shadow: not always visible and yet always present.
Once I believed that sooner or later I would come across a really wise person; today I couldn't even say what wisdom is. 
Sometimes true tolerance requires an extraordinary strength, which we are often too weak to exercise.
Unlike money, hope is all: for the rich as well as for the poor.
As long as his strength permits, the poor mortal must always climb new mountains.
We learn a lot from the mistakes of others, but even more from our own. 
A secret remains a secret until you make someone promise never to reveal it. 
Your will cannot always choose the path; very often the route is determined by chance or by the will of others. 
When you would suffocate or ignore dissent, remember how many times you dissented. 