In the first two or three years after entering college, she will almost invariably appear superior to the men of her age, more grown up, more interested, surer of herself, readier.

Later you will find her on the whole less inclined to experiment with her gifts, to feel her wings, to make unexpected dashes into life.

It begins to look as if he were the experimenter, she the conservator.

And by the time she is a senior, look out! The chances are she will have less interest from now on with man's business and more with her own! In any case she will rarely develop as rapidly in his field from this point as he is doing.
He becomes assertive, confident, dominating; the male taking a male's place.

He discovers that his intellectual processes are more scientific than hers, therefore he concludes they are superior.