The returning manager got his second spell at Stamford Bridge off to a winning start with a convincing 2-0 win over Hull City on Sunday.
Lampard says the dressing room as been inspired by Mourinho's presence and says everyone is fighting to get into to the team.
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"We are very aware of how he is and it’s like having a new teacher at school – that can only be a good thing when you have 22 players all wanting to play in the team.
"There has been a lift. We have had a great pre-season. The young players have reacted to the manager. We can’t ask for more than that and we were raring to go from the first whistle.
Chelsea face Aston Villa on Wednesday night with Paul Lambert's side also in confident mood following a 3-1 opening-day win at Arsenal.
"What matters now is we have to face an Aston Villa team this week that has just beaten Arsenal, so we can’t rest on our laurels," Lampard continued.
"Beating Hull has given us a boost. It’s about getting out of the blocks quickly."