Cardinal Francis George, the leader of the Roman Catholic Church in Chicago, is speaking out against Illinois' gay marriage bill just days before Governor Pat Quinn is set to sign the bill into law.

George warned of consequences for the church and society in a letter he asked to be placed in all church bulletins throughout the Chicago Archdiocese on Sunday, according to NBC Chicago.

“There will be consequences for the Church and society that will become clearer as the law is used to sue for discrimination,” George wrote to parishioners. “The law has made some gays and lesbians happy, and that is not a bad thing in itself. The law, however, is bad law because it will contribute over the long run to the further dissolution of marriage and family life, which are the bedrock of any society.”

Quinn is set to sign the bill into law on Wednesday.

During the debate in the House, Speaker Mike Madigan referred to Pope Francis' response to gay clergy: “Who am I to judge?”

Without mentioning Madigan by name, George, a vocal opponent of allowing gay couples to marry, said that it was dishonest to use the pope's words to support marriage equality.

“The Pope was not speaking about approving gay marriage,” George said. “To use his words against his teaching, as they were used on the floor of the State House of Representatives on November 5, is less than intellectually honest.”

(Related: IL Bishop Thomas Paprocki says marrying for gays in sin; plans exorcism.)