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COLORADO SPRINGS, Colorado (CNN) -- Less than a day after being fired from leadership of the evangelical mega-church he founded, the Rev. Ted Haggard confessed Sunday to "sexual immorality" and called himself "a deceiver and a liar."
In a letter read to members of his New Life Church on Sunday, Haggard said he is "a deceiver and a liar." Haggard apologized to his congregation in the letter and asked for their forgiveness.
"There is part of my life that is so repulsive and dark that I've been warring against it all of my adult life," Haggard said in the letter read by the Rev. Larry Stockstill, a member of the board of overseers of New Life Church. (Gallery)
On Saturday, members of the board ousted Haggard from the 14,000-member Colorado Springs church, citing his "sexually immoral conduct." (Watch what led to Haggard's firing -- 2:40)
Mike Jones claims the prominent pastor paid him for sex over a three-year period. Haggard only admitted to receiving a massage from the Denver man, in an interview Friday with CNN affiliate KUSA-TV.
The pastor also admitted that he had bought methamphetamine but said he did not use the drug and threw it away.
In his apology letter, Haggard made no mention of drug use, but said, "I am guilty of sexual immorality." He also noted that "the things I did opened the door for additional allegations." (Watch tears flow as the confession is read -- 2:41)
Haggard asked the congregation to forgive his accuser, whom the minister said revealed "the deception ... that was in my life."
Stockstill also read a letter from Haggard's wife to the women of the congregation. In it, Gayle Haggard said while her heart is broken, she remains "committed to him until death do us part."
The couple have five children.
After the letters were read, an overflow congregation, many of them wiping away tears, responded with a standing ovation.
The interim pastor, the Rev. Ross Parsley, then called upon congregants to forgive Haggard.
"It is OK to be angry, it is OK to grieve," Parsley said. But the "fall of one man" will not destroy the congregation, he said.
"Today our church family and Pastor Ted is more obedient, more repentant, more transparent than we've been in a long time," Parsley said. "You're watching the Gospel at work. You're watching healing and restoration start to occur as we go through this process."
After the service, 10-year church member Michelle Richmond predicted Haggard and the church will recover.
"I probably cried all morning," Richmond said. "He knows he's hurt us and it hurts when your brother has done something, but like Pastor Ross said, he's in a good place -- he's better off this week than he was last week -- and he will receive the healing he needs and he did a good thing for our church so that we can heal."
Jones said he went public with his allegations because of Haggard's support for a state constitutional amendment banning same-sex marriage that's on Colorado's ballot Tuesday.
"For someone who is up there preaching that marriage should only be between a man and a woman, and he's going behind his wife's back and seeing a gay man for sex -- I felt like I owed it to the gay community to expose the hypocrisy," Jones said.
Haggard also was stripped of his title as president of the National of Association of Evangelicals.
The Rev. Leith Anderson, who has been named as the group's interim president, told CNN on Monday that Haggard's failure reflects more on trust lost than on homosexuality.
"What we have here is someone who in leadership has failed the standard that he lifted up for himself," said Anderson, a Eden Prairie, Minnesota, pastor and Christian broadcaster. "The reason it's a big news story is because it's so unusual and so exceptional."
Jones has said he met Haggard three years ago when the pastor answered his escort ad, identifying himself as a man from Kansas City named "Art." He said their sexual encounters continued monthly until August.
Haggard's middle name is Arthur.
Haggard started the New Life Church 26 years ago in his basement and attained a nationwide identity among evangelicals as his church grew. He was one of a group of religious leaders who regularly participated in conference calls with White House aides, Time magazine reported.
On Friday, White House spokesman Tony Fratto sought to downplay Haggard's influence within the administration, saying he was an occasional participant in weekly conference calls between West Wing staff and leading evangelicals.
Focus on the Family founder James Dobson, one of three pastors named Sunday to counsel Haggard and his family, issued a statement Friday saying he was "heartsick" upon learning of Haggard's admissions.
CNN's Eric Marrapodi contributed to this report.