They were trying to defend themselves, their way of life. Preserve their species.

S: Who’s going to look after Naomi?
T: You should not concern yourself with that now.
S: How can you say that?

We would be telepathically linked, exchanging our thoughts. In essence, becoming one mind.

Well, I’ll say goodbye now. I won’t be transporting with the rest of you.

You’re destroying the work of every generation that came before you. Our ship isn’t just a collection of modules, it’s an expression of unity, tradition.

Star Trek: Voyager - The Disease (Season 5, Episode 17)

As your Tactical Officer, I will continue to do my best to ensure a safe passage home. As a Vulcan, I share the following sentiment: Live long and prosper.

Allow the Doctor to proceed. Lower the forcefield!

“What really happened?" 

"Voyager encountered a subspace anomaly which created a kinoplasmic radiation surge throughout most of our computers. Unfortunately it happened while you were using the holodeck.”

Kes: I don’t understand why people treat him the way they do.
Janeway: How do people treat him?
Kes: As though he doesn’t exist.