I think that many of my ideas are correct, but I'll bet you, before my death other discoveries will be made that will prompt me to alter various ideas I have about human evolution.
Donald JohansonThere have been some friendships lost over this. That's the most difficult for me. I find it very uncomfortable to know that I was at one time close friends with someone, and because of jealousies and misunderstandings and so on, these friendships have dissolved.
Donald JohansonOne has to devote oneself to a particular pursuit. To be successful at anything, you have to make a total commitment to it.
Donald Johanson