The defender and the 50-year-old Chelsea manager reportedly had a turbulent relationship, particularly during Mourinho's last season in charge at the Santiago Bernabeu.
|11/2||Real Madrid are 11/2 with Coral to win the Champions League
"I am not someone who holds grudges and I want to remember the good things about our time with Mourinho," Ramos told AS.
"Every day I wake up eager to learn new things and I am grateful to Mourinho for that.
"I think of myself as someone who gives everything and I wake up every day wanting to keep growing.
"In that sense, being at Madrid is the best place for me, because the coaches and players I work with make this the ideal dressing room to improve at.
"I think of myself as a great player, but the fans have to decide whether that’s true. All I can do is try to be humble and retain the young mind I have had since I arrived here."
Ramos joined Madrid in 2005 and has made 343 appearances for los Blancos, scoring 40 goals.
He has won three La Liga titles in his time at the club, lifting the trophy in 2007, 2008 and 2012.