"It is pretty clear that they are ineffective in stopping the course of thought at present, but they have not always been so in the past and we cannot be sure that they will not be so in the future"

John Desmond Bernal's quote suggests that the present approaches of stopping the course of thought are not working, but that this has not constantly held true and that it is possible that they might be effective in the future. This indicates that the existing approaches of controlling thought are not always long-term and that there is potential for them to be surpassed. Bernal's quote also recommends that the current techniques of controlling idea are not necessarily the most effective which there may be other methods of achieving the very same goal. This indicates that it is important to stay open to originalities and to be going to explore various methods to managing thought. Eventually, Bernal's quote suggests that it is very important to remain open up to change and to be happy to check out various techniques of managing believed in order to guarantee that the most efficient techniques are being used.