The personal log of Spock contained log entries kept while he served aboard the USS Enterprise. (Star Trek: The Original Series; Star Trek: The Animated Series)




  • "Personal Log, Stardate 5373.5, subjective time. I have returned to the past in an attempt to restore the future. I am home, and I have almost forgotten its beauty." (TAS: "Yesteryear")
  • "Personal Log, Stardate 5373.9, subjective time. The timeline seems to have changed again, yet I do not believe I have done anything to disrupt it. My memory is quite clear regarding the date my cousin saved my life and it is tomorrow. The kahs-wan ordeal is an ancient rite of warrior days. When Vulcans turned to logic, they reasoned they must maintain the tests of courage and strength to keep pure logic from making them weak and helpless." (TAS: "Yesteryear")
  • "Personal Log. The boy, Spock, should be moving towards the L-langon Mountains, he – I, had much to prove to myself. The personal ordeal upon which I embarked was meant to determine the course my life would take." (TAS: "Yesteryear")