When therefore they continued asking him, he lifted up himself, and said to them: He that is without sin among you, let him first cast a stone at her. And again stooping down, he wrote on the ground. But they hearing this, went out one by one, beginning at the eldest. And Jesus alone remained, and the woman standing in the midst. Then Jesus lifting up himself, said to her: Woman, where are they that accused thee? Hath no man condemned thee? Who said: No man, Lord. And Jesus said: Neither will I condemn thee. Go, and now sin no more. Again therefore, Jesus spoke to them, saying: I am the light of the world: he that followeth me, walketh not in darkness, but shall have the light of life.
~John 8: 7-12
The number of men and women who have deep-seated homosexual tendencies is not negligible. They do not choose their homosexual condition; for most of them it is a trial. They must be accepted with respect, compassion, and sensitivity. Every sign of unjust discrimination in their regard should be avoided. These persons are called to fulfill God's will in their lives and, if they are Christians, to unite to the sacrifice of the Lord's Cross the difficulties they may encounter from their condition.
Homosexual persons are called to chastity [as all are called to chastity]. By the virtues of self-mastery that teach them inner freedom, at times by the support of disinterested friendship, by prayer and sacramental grace, they can and should gradually and resolutely approach Christian perfection.