Timothy: "I, I think that was pretty silly when I had my hair like yours and everything." Data:

Timothy: "I, I think that was pretty silly when I had my hair like yours and
everything."
Data: "I have been told that imitation is the highest form of flattery."
-- "Hero Worship", Stardate 45397.3

Related:

• Data: "Timothy, androids do not lie." Timothy: "It was.
  me." Data: "Please explain." Timothy: "It was me. ...
• Data: "Timothy, your head movements are counterproductive.
  Can you be still?" Timothy: "But you do it." Data:...
• Timothy: "Data, are there any other androids in Starfleet?" Data:
  "No. I am the only one." Timothy: "How come you're...
• Picard: "Data, I would like you to make Timothy the best android he can possibly be." -
  "Hero Worship", Stardate 45397...
• Timothy: "Data, what's the most scariest thing that ever happened to you?" Data:
  "Fear is not a quality that I possess." Timothy: "Because...
• Troi: "'Established parameters'? You sound like Data!" Timothy:
  "'I am an android.'" Troi: "I see. Well, let's go...
• Timothy: "You hate it." Data: "No. I am not capable of hatred." -
  "Hero Worship", Stardate 45397...
• Timothy: "I can't do anything right." Data: "You are making an unwarranted extrapolation." -
  "Hero Worship", Stardate 45397...
• Timothy: "This is great. How is yours?" Data: "The complex polysaccharides,
  in reaction with the carbon dioxide, produces an...