Speaking on BBC's One Show the Christian singer said he realised letting go was the only option if he was to move forward - and also acknowledged his accusers need to seek God's forgiveness for what they've done to him.
Alex Jones admitted that the interview with Cliff was "a bit awkward" because he is currently suing the BBC after it broadcast a police raid on his home live on national television.
Sir Cliff's legal team has since claimed in documents seen by The Sun newspaper that the BBC colluded with South Yorkshire Police in order to broadcast it.
The BBC's Director-General Tony Hall has publicly defended the corporation's decision to televise the raid and even put the story up for The British Press Awards 'Scoop of the Year' award.
The Mistletoe and Wine singer said: "I woke up the second day when I got back from my home in Portugal. I went to bed and I woke up at 3:15am and I woke up thinking 'I don't think I can do this if I continue vengeance and hate'.
"So I just said: 'God, I wanna forgive this guy,' so I said, yes, okay, I forgive him.
"You know what, I felt such an ease. He didn't know I'd forgiven him. He's going to have to ask God to forgive him.
"I forgave him and therefore I didn't feel any animosity anymore and even now I can't feel hate.
"I would like to understand one day why people do this. Simple as that."
