It is beyond question that had this encounter occurred on the street it would be constitutional. The fact that an encounter takes place on a bus does not on its own transform standard police questioning of citizens into an illegal seizure,

Where is the federal question here?

It involved a constitutional issue of the gravest importance decided 4-3 by a state court on a federal issue that it was our responsibility to take the case, ... Sometimes it is easy, so it seems, to enhance your prestige by not exercising your responsibility, but that's not been the tradition of our court.

The case for freedom, the case for our constitutional principles the case for our heritage has to be made anew in each generation. The work of freedom is never done.

The Answer is answer of another question beyond that question.

It occurred to me, in 1837, that something might perhaps be made of this question (the origin of the species) by patiently accumulating and reflecting on all sorts of facts which could possibly have any bearing on it