The least important things, sometimes my dear boy, lead to the greatest discoveries. Doctor no more. Please, when Torchwood comes to write my complete history, don't tell people I travelled through time and space with her mother! The Time Lords are an immensely civilised race. We can control our own environment - we can live forever, barring accidents, and we have the secret of space/time travel. Right! So stop dilly-dallying, and cross it! No… No-no-no-no-wait-wait-wait-wait… I remember I'm-I-I… I'm with my father, we're lying back in the grass, it's a warm Gallifreyan night—

My last incarnation…oh, I was never happy with that one. It had a sort of feckless 'charm' which simply wasn't me. Let's go in! For some people, small, beautiful events are what life is all about! A TARDIS is my ship that carries me through Time and Space. T-A-R-D-I-S. It stands for Time And Relative Dimension In Space. My dear Miss Shaw, I never report myself anywhere, particularly not forthwith. I don't have a future. Why can't you leave me alone?! Yes? What is it? What do you want? An unintelligent enemy is far less dangerous than an intelligent one….

Jo, did you fail Latin as well as science? Well, who are you boys? Oh, of course! Are you his companions? Let's go in! That could blow a hole in the space-time continuum, the size of—actually, the exact size of Belgium. That's a bit undramatic, isn't it? 'Belgium'? Every great decision creates ripples. Like a huge boulder dropping in a lake. The ripples merge and rebound off the banks in unforseeable ways. The heavier the decision, the larger the waves, the more uncertain the consequences. Have faith, Brigadier. Have I ever led you astray?

You see when I started, all those years ago, I was just running. I called myself the Doctor but it was just a name. Then I went to Skaro. And I met you lot. And I understood who I was. Two wrongs don't make a left turn. Jelly baby? Geronimo! You’ll never understand. I want to see the universe, not to rule it. I'm Dr. James McCrimmon from the township of Balamory. He was dead already, I'm saving us. Follow me, and run! We're trying to defeat the Daleks, not start a jumble sale! Logic, my dear Zoe, merely enables one to be wrong with authority.

Text from: http://doctoripsum.com/