The Catholic Church has been criticized by many, including some of its own followers, for its pastoral response to the LGBT community. This criticism deserves a reply—not to defend the Church’s practices reflexively, but to determine whether we, as the Lord’s disciples, are reaching out effectively to a group in need. Christians must always strive to follow the new commandment Jesus gave at the Last Supper: “Love one another, even as I have loved you.”

To love someone as Christ loves us means to love that person in the truth. “For this I was born,” Jesus told Pontius Pilate, “to bear witness to the truth.” The Catechism of the Catholic Church reflects this insistence on honesty, stating that the church’s message to the world must “reveal in all clarity the joy and demands of the way of Christ.”

Those who speak on behalf of the church must be faithful to the unchanging teachings of Christ, because only through living in harmony with God’s creative design do people find deep and lasting fulfillment. Jesus described his own message in these terms, saying in the Gospel of John: “These things I have spoken to you, that my joy may be in you, and that your joy may be full.”

Catholics believe that, with the guidance of the Holy Spirit, the church draws its teachings upon the truths of Christ’s message.

Among Catholic priests, one of the most outspoken critics of the church’s message with regard to sexuality is Father James Martin, an American Jesuit. In his book “Building a Bridge,” published earlier this year, he repeats the common criticism that Catholics have been harshly critical of homosexuality while neglecting the importance of sexual integrity among all of its followers.

Father Martin is correct to argue that there should not be any double standard with regard to the virtue of chastity, which, challenging as it may be, is part of the good news of Jesus Christ for all Christians. For the unmarried—no matter their attractions—faithful chastity requires abstention from sex.

This might seem a high standard, especially today. Yet it would be contrary to the wisdom and goodness of Christ to require something that cannot be achieved. Jesus calls us to this virtue because he has made our hearts for purity, just as he has made our minds for truth. With God’s grace and our perseverance, chastity is not only possible, but it will also become the source for true freedom.

We do not need to look far to see the sad consequences of the rejection of God’s plan for human intimacy and love. The sexual liberation the world promotes does not deliver its promise. Rather, promiscuity is the cause of so much needless suffering, of broken hearts, of loneliness, and of treatment of others as means for sexual gratification. As a mother, the church seeks to protect her children from the harm of sin, as an expression of her pastoral charity.

In her teaching about homosexuality, the church guides her followers by distinguishing their identities from their attractions and actions. First there are the people themselves, who are always good because they are children of God. Then there are same-sex attractions, which are not sinful if not willed or acted upon but are nevertheless at odds with human nature. And finally there are same-sex relations, which are gravely sinful and harmful to the well-being of those who partake in them. People who identify as members of the LGBT community are owed this truth in charity, especially from clergy who speak on behalf of the church about this complex and difficult topic.

It is my prayer that the world will finally heed the voices of Christians who experience same-sex attractions and who have discovered peace and joy by living the truth of the Gospel. I have been blessed by my encounters with them, and their witness moves me deeply. I wrote the foreword to one such testimony, Daniel Mattson’s book, “Why I Don’t Call Myself Gay: How I Reclaimed My Sexual Reality and Found Peace,” with the hope of making his and similar voices better heard.

Cardinal Sarah is prefect of the Congregation for Divine Worship and the Discipline of the Sacraments.