Eto'o had one thing to thank his former manager for whilst new boss Roberto Martinez was delighted to sign the player.
There were suggestions that Eto'o had fallen out with his previous manager when his age was questioned but the striker seems focused on his career with his new club.
Speaking at a press conference where the prolific striker was unveiled to the media, Eto'o said it was down to the Chelsea manager that he was 'accepted' in the Premier League, and he could make his debut against his old side on Saturday evening at Goodison Park.
Eto'o - who previously worked under Mourinho at Inter Milan where they won the Champions League together - said there had been a number of other clubs interest in him, after he became a free agent.
He said: "In the last 10 days I have travelled quite a lot and spoke to quite a few teams.
"I was always motivated coming to Everton. We share the same vision about the playing of football.
"I want to stay at the top and Everton allows me to do that."
Everton's local rivals Liverpool were strongly rumoured to be interested in Eto'o but they opted to pursue Mario Balotelli instead, paving the way for the former Barcelona forward to join the Toffees.
Eto'o described a meeting he had with manager Roberto Martinez as 'inspiring'. However, his boss has said the forward might not be fit to face Chelsea on Saturday, but did say he is eager to play.
Martinez added that the experience the striker can bring the side could be valuable given the amount of younger players in the Everton squad.
He said: "It was an instant feeling when I sat down and met him. I was impressed where he was mentally.
"We have enormous young talent in the dressing room and they need guidance and know-how, how to control big games.
"It was clear we needed a number nine. We now have three players to play in that position at the club."
Given the extra commitments the club has this season with the Europa League, and their ambitions of breaking into the top four - which results in qualification for the Champions League - the signing represents a major coup for the club as they have a player with a great reputation for scoring goals at every club he has been at.