This quote is written / told by Morihei Ueshiba between December 14, 1883 and April 26, 1969. He/she was a famous Athlete from Japan.
The author also have 29 other quotes.
"A person who doubts himself is like a man who would enlist in the ranks of his enemies and bear arms against himself. He makes his failure certain by himself being the first person to be convinced of it"