The ultimate truth is like the flavour of an apple which you can't see with the eye or hear with the ear. The only way to experience it is to put the teachings into practice. Once you taste it, you are no longer in any doubt about its flavour and you do not have to ask anyone else. The problem is solved.
Ajahn ChahTo observe and watch one's own mind is something really interesting. The untrained mind will run and follow its old habit patterns. Because it has not been trained and taught, it will get lost in all kinds of stories and issues. Therefore we have to train our mind. The meditation practice in Buddhism is all about training one's own mind.
Ajahn ChahWhen we conquer ourselves, then everything will be conquered: oneself, others, and all the sense objects as well, coming in by way of the eyes, ears, nose, tongue and body -- it will all get conquered like this.
Ajahn Chah