There's nothing more powerful than a committed and determined

Based on this:

Bjorn has decided to join a fraternity, but before he gets in, he has to go through an initiation. During the initiation he has to endure all sorts of pain and humiliation.

We can infer that Bjorn will join the fraternity and feel more commited to it the he would have without the initiation.

Explanation:

There are two reasons behind this. First of all Bjorn experience will make him be recognized as a valued member of that group because he has proven that he can do the necessary things to be valued as one. Fulfilling the social need in Maslow's pyramid of recognition. Second, he would value the effort and how it made him win benefits. Associating a reward- behavior relation establishing a reinforcement behavior,