These lines echo the final paragraph of Loving v. Virginia, the case in which the Supreme Court threw out laws banning interracial marriage in 1967.
"Marriage is one of the 'basic civil rights of man,' fundamental to our very existence and survival," Chief Justice Earl Warren wrote then.
And the passage is also reminiscent of the conclusion of Griswold v. Connecticut, an important case from 1965 on contraception among married couples.
"Marriage is a coming together for better or for worse, hopefully enduring, and intimate to the degree of being sacred," Justice William O. Douglas argued. "It is an association that promotes a way of life, not causes; a harmony in living, not political faiths; a bilateral loyalty, not commercial or social projects. Yet it is an association for as noble a purpose as any involved in our prior decisions."