It is a tremendous waste of energy to try to block anyone else. That same energy could be applied to furthering your own success.
Frederick LenzPractice meditating on the heart chakra. This is only one of them, but it's quite good for the first few years of your meditative practice.
Frederick LenzAll physical and nonphysical things have another side, a side that is not visible to the senses or accessible to the reasoning mind, a side that can only be known and experienced intuitively by emptying one's own mind of thoughts.
Frederick Lenz