Its not a straight forward way to success, its just a poetic way, as you know poets live in a different plane of thoughts and thinking.

Based on the words ~ “Do to others what you want others to do to you” 

“What you do not want to happen to you, do not do it yourself either “

Goodwill causes success,

Just with one problem.

It causes others success,

Just with one exception.

If you follow goodwill,

Its others success.

If others follow goodwill,

Its your success.

So be good, and follow goodwill ! Life would be easier.

And You will be succesful