What constitutes clarity of purpose?
This movie is more concerned with character development than with car chases or explosions, which seems to be the norm for today. Cary Grant adopts unspoken attitudinal positions that affect others in a positive way. This seems to bother Hume Cronyn because he assumes "people will talk," not understanding the reason for the silence. Quite likely motivated by jealousy, Cronyn attempts to have Grant thrown off the faculty. and calls a faculty meeting to hopefully attain that goal.
In dramatic interplay between the "good and evil" of the situation not only is the issue admirably resolved, but the frequent strains of Brahm's ACADEMIC FESTIVAL OVERTURE gradually build up the movie goer's emotional response. This is a good movie to see--certainly more than once.