Lamps struck twice in their 3-0 win at West Ham United yesterday.
Mourinho said: "He's in a moment where he has nothing to prove, he just has to enjoy the last years of his career, try to play to the maximum level he can and try to score goals, because scoring goals is part of his DNA as a player, and enjoy life.
"I think I came at the right moment, I was his manager during the best moment of his career and now I've come back to enjoy the last period of his career. When he has that relationship with his manager he feels even more comfortable and able to enjoy himself."
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