The scientific metaphysician fixes his attention powerfully on a certain idea until he manifest his idea. Ideas come from within through meditation and prayer. Once we have this idea we must act just as if it were part of our life. This is also mentioned in the Bible. However, this is not about religion but power of thought and ideas. You see our words bring forth whatever we put into them but not only  physically but innerpersonal (hence the reason why affirmations are so good.) People's whole character is determined by the thoughts for which he allows a place in his mind; therefore I affirm peace and harmony for my life.