This is an historic speech which very well clarifies the respective roles of each of the three branches of government, the executive (represented by the President), the legislative (represented by the Congress) and the judicial (represented by the Senate).
Above all, it emphasizes the importance of truth as the guiding principle of good government, truth over emotion and arbitrary rule, which is what the rule of law and right is supposed to achieve.
The New York State Supreme Court Building reads
THE TRUE ADMINISTRATION OF JUSTICE
IS THE
FIRMEST PILLAR OF GOOD GOVERNMENT