The 50-year-old coach is set to take charge of his first competitive Blues fixture since returning to Stamford Bridge after his 2007 departure when his side welcome newly-promoted Hull City on Sunday.
Lampard was a focal figure in Mourinho's first Chelsea team that produced a trophy-laden three years, including two Premier League triumphs.
Chelsea are 2/1 with BetVictor to win the Premier League in 2013/14
"The time he (Mourinho) came to the club before, he took my career a long way," Lampard said at the launch of his new book.
"It was more my mind-set rather than anything particularly tactical in football terms.
"I've always had a huge appreciation of that and, even when he wasn't at the club and has been away, we've stayed in touch.
"I wouldn't say (we're like) father-son because he has a very good way, as all the best managers do, of being quite familiar with you and helping you, but also remaining a manager.
"He's not a father figure too much, so you have to respect him. I think we've tried to find the right mix in our relationship and maybe we have done."