Meditate, and you will probably dredge up various nasty matters from your past. The suppressed material that has been buried for quite some time can be scary. But exploring it is also highly profitable. No activity is entirely without risk, but that does not mean that we should wrap ourselves in a protective cocoon. That is not living, but is premature death. The way to deal with danger is to know approximately how much of it there is, where it is likely to be found, and how to deal with it when it arises.