I've always felt that maybe ...

I've always felt that maybe one of the reasons that I did well as a student and made such good grades was because I lacked confidence. Lacked self-confidence, and I never felt that I was prepared to take an examination, and I had to study a little bit extra. So that sort of lack of confidence helped me, I think, to make a good record when I was a student.
 Denton Cooley

Quotes from the same author

I find I'm luckier when I work harder.
 Denton Cooley
Of the many 'firsts' with which I have been involved at the Texas Heart Institute —including the first successful human heart transplant in the United States and the first total artificial heart transplant in the world—the achievement that may have the greatest impact on health care did not occur in the operating room or in the research laboratory. It happened on a piece of paper... when we created the first-ever packaged pricing plan for cardiovascular surgical procedures.
 Denton Cooley
I still take failure very seriously, but I've found that the only way I could overcome the feeling is to keep on working, and trying to benefit from failures or disappointments. There are always some lessons to be learned. So I keep on working.
 Denton Cooley
I've always thought that my exposure to competitive sports helped me a great deal in the operating room. It teaches you endurance, and it teaches you how to cope with defeat, and with complications of all sort. I think I'm a well-coordinated person, more than average, and I think that came through my interest in sports, and athletics... Playing basketball you have to make decisions promptly, and that's true in the operating room as well.
 Denton Cooley