A great deal of stress is caused by the mind inappropriately focussing on anything other than 'the moment in hand'. The one point exercise directs the mind out of the head away from 'where all the thoughts are' to a more 'relaxed' place.
thanks for your interesting comments. Your mention of 'the moment in hand' has helped me make a possible link between the one point concept and 'mindfullness meditation' where the aim is the be 'in the present moment'. I guess in effect concentrating on the one point is a means of focussing on something that is in the present moment rather than filling your mind with 'what you should have done yesterday', or 'what you intend to do tomorrow'.
There has been a move towards integrating mindfullness meditation into psychology by merging it into mainstream cognitive therapy and thereby developing "mindfullness based cognitive therapy' (I have done a bit of reading on this but am no expert!). Maybe the concept of focussing on the one point is not that far removed from mindfullness meditation - maybe in essence it is another way of doing much the same thing.
Thanks again for your comments - they have stimulated some interesting stuff for me to think about.
Would love to hear any further opinions on this.