Nathan Scott, from Tsuki Kage Dojo, has compiled the teachings of O'Sensei that can be found in the literature (of special importance are the texts written by O'Sensei himself) and put them together in his website for us to enjoy... and for some to be annoyed.
The compilation can be found at http://www.tsuki-kage.com/ueshiba.html and contains quotes from "Budo Renshu" and "Budo" from O'Sensei, "Traditional Aikido" from Morihiro Saito, "Total Aikido" and "Aikido Shugyo" from Gozo Shioda, and "The Founder of Aikido, Morihei Ueshiba" from Kisshomaru Ueshiba.
Ueshiba Morihei Sensei, founder of Aikido, has been often quoted and even more often written about by those that study Aikido. However, the choice of material quoted and discussed is almost exclusively in regards to his background or spiritual teachings. The following translations of his writings and lectures from the pre-WWII era are rarely acknowledged or discussed, and as such have been re-printed here to offer a bit of balance and perspective to those currently studying or researching Aikido.