“ The Appellate Division of the New York Supreme Court has interpreted § 593 of the New York Unemployment Insurance Law as requiring an applicant for unemployment benefits, as a condition to receiving those benefits, to stand ready to accept suitable employment when tendered, even though acceptance of the employment would compel him to join a union as to which he has 'conscientious objections.' The decision of the New York courts places a burden on the petitioner's freedom of association-a freedom we have placed on a high, if indeed not a 'preferred' plane. ”

“ Consequently, this case may well present important issues that ought to be decided, particularly if the result of the New York holding is that a worker must decide between a deeply felt belief which falls in the First Amendment area, and crucial unemployment benefits. ”