The article deals with the position taken by the Constitutional Court regarding religious arguments in unconstitutional processes in controversial cases. The proposed analysis of the problem has as a theoretical reference the philosophical proposal of Jürgen Habermas on the role of religion within the public spherlisis jurisprudencial de tres propuesta acerca del rol de la religisipor todos los Magistrados de la Corte Constitucional (posie. It reflects on the argument put forward in the constitutional debate within the Constitutional Court, in the case of egalitarian marriage addressed by Sentence C – 577 of 2011. How the arguments of debate are incorporated in order to assess whether they are consistent with the liberal perspective and the role of religious arguments in this debate, are analyzed as well.