How to be bold?

The best way is through practice. I know it may sound corny (and everyone tells you this), but you just have to DO it. I used to be extremely shy reading in front of the class, doing presentations, speaking in a foreign language, etc. Going to college, however, I have to do one of these things at least once a week (every day we had to speak in front of the entire class in a foreign language, though) and I really got to be a lot more comfortable with it. I know what to do now to at least not APPEAR nervous (it's ok to be, it's perfectly normal, just try to make your audience think you're not) and I learned to relax after a while. So, my best advice to you is to just do it. Practice in front of friends and family to start with and then ease your way into, say, volunteering to read something in class (if your class does those sorts of things) or participating slightly more frequently in debates. Eventually you'll get used to it and won't have a problem participating. :) Practice makes perfect.

If you try to see you in others and others in you you can be bold and the element of fear really vanishes. This is the very crux of philosophy and the real secret is the the idea of oneness and this alone is permanent.

I would start out here, just debate with people online until you feel that you understand the correct way to put your points together and respond to any responses you may revieve. Then, next time you are with your family and friends, bring up a controversial topic that you know will get a debate going (just be careful, so families... like mine... have a tendancy to cut the debate off just as they realize they are loosing and make you look like a loser for even starting the debate in the first place. Also, some families don't know how to debate properly and resort to cussing, screaming, and belittling you in an effort to just at least have the last word.) When you are ready take on a small crowd... and build your way up. What do they say? Rome wasn't built in a day... so I imagine the great debaters over the years didn't just wake up one day with an amazing skill with debate.