A 75-year-old man who abused two schoolboys in the 1970s and 1980s has been jailed for seven years.
Albert Victor Marvin caused "severe psychological damage" that has blighted both victims' lives, Leicester Crown Court was told.
At times they felt suicidal.
Marvin, of Church Hill, Bagworth, pleaded guilty to one count of indecently assaulting a boy, aged between 14 and 15, at a children's home in East Yorkshire in the early '70s.
Marvin also pleaded guilty to three counts of indecently assaulting another boy, aged between 12 and 13, in Leicestershire in the early '80s.
In relation to the East Yorkshire incident, Philip Gibbs, prosecuting, said Marvin was working on a farm attached to St William's Children's Home, in Market Weighton, and abused his position to sexually touch the vulnerable teenager in the outhouse of a derelict cottage.
With regard to the Leicestershire incidents, Mr Gibbs said the victim would visit the defendant, who worked on a farm near Desford crossroads, to play in the fields. He let the victim use an air rifle, but turned it into a "bargaining tool" for sexual favours – and he molested the boy.
Decades later, the victims independently reported the abuse to the police to get "closure".
Sentencing Marvin, Judge Robert Brown told him: "I expect you've lived 40 years of your life in a normal way, unaffected.
"They've lived with constant pain and torment at what you did to them and they've suffered severe psychological harm.
"I'm not sure if you understand the extent of the harm you caused, but it lives with them every day.
"Hopefully these proceedings will help them by bringing closure and make it easier for them to receive help and counselling.
"I take into account your age and the fact a prison sentence will be more arduous than for a young man."
In a "powerful" personal statements, the victims described the effect Marvin's actions had had on their lives.
The first victim described being "consumed with anger" by what Marvin had done.
He said: "It's had an enormous impact on my whole life."
The abuse affected his schooling and relationships with others.
He said: "I couldn't have proper friendships with men and just held it all inside for 40 years."
The victim still suffered nightmares.
The second victim, who suffered two major emotional break-downs, said the abuse "completely blighted" his life.
He said: "It's impacted on almost every aspect of my life and I still feel very angry – like being in hell.
"I feel I've had most of my life stolen from me."
He has been diagnosed with post-traumatic stress disorder and suffers flashbacks and mood swings.
He said: "At one stage I became delusional.
"I was waking up every morning wishing I could put a rope around my neck to get rid of the horrible feeling."
James House, mitigating, said: "The offences occurred 33 and 42 years ago with a 10 year gap between them.
"He has no previous convictions and has contributed to society in positive way.
"He was also a school governor about which there's no suggestion of misconduct.
"He's worked in agriculture all his life and for the last 20 years, before retirement, worked for Leicester City Council's cemeteries department as a gardener and supervisor.
"He's now only too aware of the damage his actions caused the victims and offers a genuine apology.
"He accepts responsibility for his wrongdoing."
Marvin was told he will have to enlist on a sex offenders register for life, and was made the subject of an indefinite sexual offences prevention order, banning unsupervised contact with children under 16.
Detective Constable James Potts, who investigated the crimes, said after the case: "Marvin abused his victims over some years and put them in a position where they felt unable to tell someone they trusted.
"His victims were left traumatised by what happened and continue to suffer to this day, but have shown commendable courage to draw a line under the abuse they suffered as children and come forward to the police so their attacker can face justice."