Picard: Data, give me a list of anything in this system that has been affected by the star's destruction. Data?
Data: Sorry, sir. It will take the computer a few moments to compile the information.
Picard: Data, are you alright?
Data: No, sir. I am finding it difficult to concentrate. I believe I am overwhelmed with feelings of remorse and regret concerning my actions on the observatory.
Picard: What do you mean?
Data: I wanted to save Geordi, but I experienced something I did not expect...fear. I was afraid...According to our current information, the destruction of the star has had the following effects in this sector: gamma emissions have increased by .05 percent...Captain, I cannot continue with this investigation. I wish to be de-activated until Dr. Crusher can remove the emotion chip.
Picard: Are you having some kind of malfunction?
Data: No, sir. [Getting angry] I simply do not have the ability to control these emotions.
Picard: Data, I have nothing but sympathy for what you are feeling, but right now I need...
Data: [Shouting] Sir, I no longer want these emotions! De-activating me is the only viable solution!
Picard: Part of having feelings is learning to integrate them into your life, Data. Learning to live with them.
Data: [Crying] Sir, I cannot...
Picard: You will not be de-activated. You're an officer aboard this ship, and I require you to perform your duty. That is an order, commander.
Data. Yes sir. I will try, sir.
Picard: Sometimes it takes courage to try, Data. Courage can be an emotion too.
from Star Trek: Generations