In Sam’s own words
"Homosexuality is an issue I have grappled with my entire Christian life. It took a long time to admit to myself, longer to admit to others, and even longer to see something of God's good purposes through it all. There have been all sorts of ups and downs. But this battle is not devoid of blessings, as Paul discovered with his own unyielding thorn in the flesh. Struggling with sexuality has been an opportunity to experience more of God's grace, rather than less….
Peter said to Jesus, “We have left everything to follow you!” “I tell you the truth,” Jesus replied, “no one who has left home or brothers or sisters or mother or father or children or fields for me and the gospel will fail to receive a hundred times as much as in this present age (homes, brothers, sisters, mothers, children and fields—and with them, persecutions) and in the age to come, eternal life.” (Mark 10:28-30)
Following Jesus involves leaving things behind and giving things up. For gay people, it involves leaving behind a gay lifestyle.
However much we have to leave behind we are never left out of pocket. Whatever we give up Jesus replaces, in godly kind and greater measure. No one who leaves will fail to receive, and the returns are extraordinary—a hundredfold. What we give up for Jesus does not compare to what he gives back. If the costs are great, the rewards are even greater, even in this life. For me these include a wonderful depth of friendship God has given me with many brothers and sisters; the opportunities of singleness; the privilege of a wide-ranging ministry; and the community of a wonderful church family. But greater than any of these things is the opportunity that any complex and difficult situation presents us with: to learn the all-sufficiency of Christ—learning that fullness of life and joy is in him and his service, and nowhere else. There is a huge amount to say on this issue, but the main point is this: the moment you think following Jesus will be a poor deal for someone, you call Jesus a liar. Discipleship is not always easy. Leaving anything cherished behind is profoundly hard. But Jesus is always worth it."