1 "After a time, you may find that having"
is not so pleasing a thing, after all, as "wanting.
It is not logical, but it is often true."
(Amok Time)

2 "Emotional, isn't she?"-Spock
"She has always been so."-Sarek
"Indeed. Why did you marry her?"-Spock
"It seemed the logical thing to do at the time."-Sarek
(Journey To Babel)

3 "Computers make excellent and efficient servants,
but I have no wish to serve under them.
Captain, a starship also runs on loyalty to one man.
And nothing can replace it or him."
(The Ultimate Computer)

4 "It [being a Vulcan] means to adopt a philosophy,
a way of life which is logical and beneficial.
We cannot disregard that philosophy merely for personal gain,
no matter how important that gain might be."
(Journey to Babel)

5 "Many Myths are based on truth."
(The Way to Eden)

6 "On my planet,
to rest is to rest -- to cease using energy.
To me, it is quite illogical to run up and down
on green grass, using energy, instead of saving it."
(Shore Leave)

7 "I realize that command does have its fascination,
even under circumstances such as these,
but I neither enjoy the idea of command
nor am I frightened of it.
It simply exists, and I will do whatever
logically needs to be done. "
(The Galileo Seven)

8 "Where there's no emotion, there's no motive for violence."
(Dagger of the Mind)

9 Without facts, the decision cannot be made logically.
You must rely on your human intuition.
(Assignment: Earth)

10 "I object to intellect without discipline;
I object to power without constructive purpose."
(The Squire Of Gothos)

11 "It is undignified for a woman to play servant
to a man who is not hers."
(Amok Time)

12 "Live long and prosper!"

13 "There is a multi-legged creature crawling on your shoulder."