“When your techniques are rough it means you are forcing against the principles; proof that you are still immature. You will not be able to stand up to a stronger opponent — you must try to follow the principles. Your character comes out in your techniques. So do the habits of your mind. By correcting the techniques, you can correct the bad habits of your mind. If you constantly collide with others in your practice, your mind will develop a habit of clashing with other people.”
49
Ki Sayings (2003)
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Koichi Tohei 43
Japanese aikidoka 1920–2011Related quotes

Talks and Dialogues Saanen 1968 : 1st Public Talk (7 July 1968) http://www.jkrishnamurti.org/krishnamurti-teachings/view-text.php?tid=4&chid=2
1960s
Context: There are the states of inattention and of attention. When you are completely giving your mind, your heart, your nerves, everything you have, to attend, then the old habits, the mechanical responses, do not enter into it, thought does not come into it at all. But we cannot maintain that all the time, so we are mostly in a state of inattention, a state in there is not an alert choiceless awareness. What takes place? There is inattention and rare attention and we are trying to bridge the one to the other. How can my inattention become attention or, can attention be complete, all the time?

“If you correct your mind, the rest of your life will fall into place.”

Sjálfstætt fólk (Independent People) (1935), Book Two, Part I: Hard Times

“You can do anything you put your mind to and just to follow your dreams.”
McKenna Grace [citation needed]
“Your only limitations are those you set up in your mind, or permit others to set up for you.”
“you have to ‘lose your mind’ before you can come to your senses.”
Source: Way of the Peaceful Warrior