"One might have feared to encounter this august and sonorous phrase in an opinion defending the real Roe v. Wade, rather than the revised version fabricated today by the authors of the joint opinion. The shortcomings of Roe did not include lack of clarity: Virtually all regulation of abortion before the third trimester was invalid. But to come across this phrase in the joint opinion which calls upon federal district judges to apply an "undue burden" standard as doubtful in application as it is unprincipled in origin—is really more than one should have to bear."