"In discussing the deferring of a marriage, theologians frequently speak of quasi perpetual postponement or postponement for a very long time, as exceeding the legislator’s power to demand." (Pages 419-420)
"To conclude the discussion of this point, it may be stated that, although the Church most certainly has the power to establish diriment impediments and to restrict thereby a Christian’s right to marry, it has no power to suppress that right entirely. If an ecclesiastical law, otherwise just and commendable, would by reason of circumstances thus confiscate the natural right to marry, then insofar as that particular situation is concerned, the ecclesiastical law ceases to bind, precisely because the Church’s power to urge the obligation of the law in those circumstances is no longer existent.
* . . . positive human law, while it may for the common good establish regulations for the use of a right, has no authority to suppress the right itself which is given by nature. Now nature, in bestowing upon human beings the power of generation, allows the normal use of that power. In other words, the office of a human lawgiver is to adapt the order of nature to varying circumstances and to supplement its general decrees by more definite provisions; but he cannot subvert or contradict that order . . .
*(Vermeersch, What Is Marriage?, n. 28.)