Earlier this week, Bill Gross continued his streak of bold statements. This time, he claimed he was looking in the mirror and questioning if he should be considered a great investor. Gross is famous for his colorful commentary, but the bond king even went so far as to question the aptitude of greats like Warren Buffett.

In this video, Motley Fool financials analyst David Hanson reminds investors that they can still be successful investors if certain principles are followed -- and discusses why Mr. Gross may be way off base.