I would like to point out that this quote comes from Shaw's play 'Man and Superman'. Specifically, from an appendix to the play 'Maxims for Revolutionists'[1], written by the character John Tanner.

Have a read through some of the other maxims and make your own mind up as to the author's viewpoint.

[1] https://en.wikisource.org/wiki/Man_and_Superman/Maxims_for_R...