Risk comes from not knowing what you're doing

Hi,
Mr. Warren Buffett another famous quote: "Risk comes from not knowing what you're doing." I really love this quote. I found out that in life we do a lot of things that we feel that we know what we are doing but end up in the wrong things. This quote made me understand more about why and how i end up the wrong way. All this seem to to be a very simple reason, most people feel that they know what they are doing but in fact not knowing what they really is doing. Feeling that you know what you are doing is different with know what you are doing. Hope everyone can find out the real " knowing what you're doing" and not get off track.