Commitment is an important characteristic of the ethicist. Commitments are made by being an active participant in society, rather than a detached observer or outsider. The ethicist has a strong sense of responsibility, duty, honor and respect for his friendships, family, and career. Judge Vilhelm uses the example of marriage as an example of an ethical institution requiring strong commitment and responsibility. Whereas the aesthete would be bored by the repetitive nature of marriage (e.g. married to one person only), the ethicist believes in the necessity of self-denial (e.g. self-denying unmitigated pleasure) in order to uphold one's obligations. Kierkegaard had Judge William speak again in his 1845 book "Stages on Life's Way". Here he described the enemies the single individual faces when trying to make a commitment, probability and the outcome.