Second, never believe that you know everything. One of the most important lessons I learned in graduate school was to be intellectually honest with myself as to what I know and what I do not know and to combine this honesty with a passion to never stop learning. The mentor who taught me this lesson made it very simple to remember. The day you believe you know everything is the day you know nothing and others will show you that you know nothing. Always be honest in what you do know, and more importantly, always be intellectually curious and willing to learn new ideas or reshape your thinking on current ideas.