(Reply on what constitutes scientific proof:)"The question is much too difficult for me.

Experience is knowledge. All the rest is information.

Galileo - the father of modern physics - indeed of modern science.

You accept the historical Jesus?

The only thing more dangerous than ignorance is arrogance

Everyone must become their own person, however frightful that may be.

All of us who are concerned for peace and triumph of reason and justice must be keenly aware how small an influence reason and honest good will exert upon events in the political field.