Related:

• Humans do claim a great deal for that particular emotion (love).
  -- Spock, "The Lights of Zetar," stardate 5725.6....
• You have a fine personality..but not for a human.
• It is a human characteristic to love little animals, especially if they're attractive in some way.
  -- McCoy, "The Trouble with Tribbles," stardate 4525.6....
• The first thing in the human personality that dissolves in alcohol is dignity.
• We all have our darker side. We need it; it's half of what we are.
  It's not really ugly, it's human. -- McCoy, "The Enemy Within," stardate 1673.5....
• McCoy: "Are you out of your Vulcan mind? No human can tolerate the radiation that's in there!
  Spock: "As you are so fond of observing, Doctor, I am not human....
• Blast medicine anyway! We've learned to tie into every organ in the human body but one.
  The brain! The brain is what life is all about. -- McCoy, "The Menagerie," stardate 3012.4....
• Hope -- I always thought that was a human failing, Mr.
  Spock? True, Doctor. Constant exposure does result in a certain degree of contamination....
• Hot as Vulcan. -- McCoy, "Amok Time", stardate 3372.7.