The full text of this letter is found on the Vatican website.

Although the particular inclination of the homosexual person is not a sin, it is a more or less strong tendency ordered toward an intrinsic moral evil; and thus the inclination itself must be seen as an objective disorder.

Therefore special concern and pastoral attention should be directed toward those who have this condition, lest they be led to believe that the living out of this orientation in homosexual activity is a morally acceptable option. It is not.

... Human beings, therefore, are nothing less than the work of God himself; and in the complementarity of the sexes, they are called to reflect the inner unity of the Creator. They do this in a striking way in their cooperation with him in the transmission of life by a mutual donation of the self to the other.

...To choose someone of the same sex for one's sexual activity is to annul the rich symbolism and meaning, not to mention the goals, of the Creator's sexual design. Homosexual activity is not a complementary union, able to transmit life; and so it thwarts the call to a life of that form of self-giving which the Gospel says is the essence of Christian living. This does not mean that homosexual persons are not often generous and giving of themselves; but when they engage in homosexual activity they confirm within themselves a disordered sexual inclination which is essentially self-indulgent. ...

As in every moral disorder, homosexual activity prevents one's own fulfillment and happiness by acting contrary to the creative wisdom of God. The Church, in rejecting erroneous opinions regarding homosexuality, does not limit but rather defends personal freedom and dignity realistically and authentically understood.

Thus, the Church's teaching today is in organic continuity with the Scriptural perspective and with her own constant Tradition. ...

Nevertheless, increasing numbers of people today, even within the Church, are bringing enormous pressure to bear on the Church to accept the homosexual condition as though it were not disordered and to condone homosexual activity. Those within the Church who argue in this fashion often have close ties with those with similar views outside it. These latter groups are guided by a vision opposed to the truth about the human person, which is fully disclosed in the mystery of Christ. They reflect, even if not entirely consciously, a materialistic ideology which denies the transcendent nature of the human person as well as the supernatural vocation of every individual.

It is deplorable that homosexual persons have been and are the object of violent malice in speech or in action. Such treatment deserves condemnation from the Church's pastors wherever it occurs. It reveals a kind of disregard for others which endangers the most fundamental principles of a healthy society. The intrinsic dignity of each person must always be respected in word, in action and in law.

But the proper reaction to crimes committed against homosexual persons should not be to claim that the homosexual condition is not disordered. ...

What, then, are homosexual persons to do who seek to follow the Lord? Fundamentally, they are called to enact the will of God in their life by joining whatever sufferings and difficulties they experience in virtue of their condition to the sacrifice of the Lord's Cross.

... Christians who are homosexual are called, as all of us are, to a chaste life. As they dedicate their lives to understanding the nature of God's personal call to them, they will be able to celebrate the Sacrament of Penance more faithfully and receive the Lord's grace so freely offered there in order to convert their lives more fully to his Way.