His story. Spareing no details. Did Han really know what he was asking. Jacen looked away after the comment, unsure of what just a statement like that would mean. He didn't understand how explaining the truth about everything would help, or even how long it would take. "Han...asking that. I've done a lot. awful things, I've attacked your own home planet when they decided to stand against the Government. But everything I did, it was because I had to, because I truly believed it was right, and I don't regret that for a second. But I'm not sure that telling you it all now would help matters. There's a lot."
He paused for a moment, thinking of what he could do, what he could show his father. There was flow walking of course. He could take Han through time and show him events as they had transpired, it would be hard on his father that had never properly understood the Force but maybe it would help. "Theres something I could do, but it wouldn't be easy. I'd be able to...show you the events as they happened, bit by bit. It's a power I possess." There was also Chewie and Force did he not want to be the one to explain to his father about Serpindal and everything that had happened, and lead to that. But he'd have to know someday.
If Jacen had his way he'd never had to explain this but he wasn't any more of a coward than Han was and his father deserved the truth.
"I did some awful things Han. You should think carefully if you want to see all of it."