Mifune has increased the training for the junior high and high school students.  To sweeten the deal, he has offered both groups a valuable prize, and it’s going to be big.
Overestimating your abilities 
will only hold you back, Doctor.
La sobreestimación obstruye 
el progreso, doctor.
La sobreestimación obstruye el progreso, doctor.
Superestimar suas habilidades
 só vai atrasá-lo, doutor.