Why should I “sweep” my mind? It sounds a bit scary. If we find that we are not getting the kind of joy out of our experience of life that is promised then the problem is caused by the accumulated thoughts and truths that occupy our mind, and the way in which those thoughts and truths filter, color and determine the way in which we respond to our experiences.
Quite simply: The state of our mind becomes the state of our world and truths that occupy our mind become the truths of our world. If it is the case that we are not getting the joy of life that we deserve then mental hygiene, sweeping the old accumulation of unneeded truths from our mind is the way to to turn the state our life around and raise our spirits so that we can live freely and enjoy our life to the fullest.
There is nothing harmful in taking charge of your own mind and cleaning it up so that it is a better fit with your desire for freedom and happiness. Human life is meant to be enjoyed not endured.