Eto'o, 32, revealed he could not be more delighted with how his first five months at Stamford Bridge have gone.
"At the moment we are still in practically all the competitions. If Chelsea are not the best club in the world then they are one of the best clubs in the world, so I don't know if we are going to win everything but the season is going well so far," he said.
"I like playing and when I get the chance to do that I have to help my team-mates.
"There is a huge difference between English football and the other championships, you almost can't compare it, but I am trying to adapt very quickly and that's okay.
"The most important thing in life is to work hard. Football is a part of my life and I try to be happy all the time. That's why I'm always smiling. If my work allows me to be even happier, then that is great."
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