There are three reasons why we don't get good at Aikido or anything else for that matter.I can't ... I won't... I don't ...
It is said that every movement begins with a thought. Therefore how we not only speak but how we think is extremely important. These three word contractions are the gatekeepers of success whether thought or spoken. If we do use them as part of our everyday language then we probably won't achieve much in life let alone get good at Aikido. If Aristotle was right when he said, "Well begun is half done," then we need to modify how we think as well as how we speak in order to become more successful at whatever it is we are doing.
How about trying... I can... I will... I do...