I don’t think this means to literally scare you but more that you should do something that gets the blood pumping through your veins. Something along the lines of perhaps joining a group that you’ve wanted to join for a while but getting to know a bunch of new people scares you. Or just getting on a bus or train to somewhere you’ve never been before but have always wanted to explore, etc. You get the picture? We all put off or dismiss things we’d like to do but are too scared or nervous about the reaction of others. Why put it off any longer, make a resolution to do something every day that scares you. Even if you only do it for a week, a month, won’t it be fun and, who knows, what it could lead to in the future. Exciting times.