Truly Lincoln was our wisest president, also the one I respect the most. Here are some other quotes by him that would relate to Bush's attempt to pass an amendment banning gay marriage.
Don't interfere with anything in the Constitution. That must be maintained, for it is the only safeguard of our liberties.
--Abraham Lincoln
Our safety, our liberty, depends upon preserving the Constitution of the United States as our fathers made it inviolate. The people of the United States are the rightful masters of both Congress and the courts, not to overthrow the Constitution, but to overthrow the men who pervert the Constitution.
--Abraham Lincoln
And here's my favorite by Ayn Rand in relation to gay marriage amendment.
The [U.S.] Constitution is a limitation on the government, not on private individuals ... it does not prescribe the conduct of private individuals, only the conduct of the government ... it is not a charter for government power, but a charter of the citizen's protection against the government.
--Ayn Rand
Everyone has the right to make his own decision/s, but none has the right to force his decision on others.
--Ayn Rand
Individual rights are not subject to a public vote; a majority has no right to vote away the rights of a minority; the political function of rights is precisely to protect minorities from oppression by majorities (and the smallest minority on earth is the individual).
--Ayn Rand
The basic point should be, it doesn't matter whether someone agrees with gay marriage or not. It's "ok" to be against it, but no one has the right to force their personal beliefs on anyone else (pending that other person is not directly harming anyone else).