That is the meaning

Often understood in social or professional terms, so that the more visibly successful a person is, the more social and professional rewards and opportunities come their way.

Also understood as a form of logical progression which is different from the generalised magnetism of social and professional success - such as when you start to be successful in one area, or in solving one problem, the rest tends to unfurl in your favour.

I think it means that as one nears success, one's chances of being eventually successful increase more than proportionately.

Imagine a political party in a campaign. Once they begin to do better than their competitors, they quickly surpass them with much more of the vote, since people sense they will win and therefore help them.

You can try to explain, argue, or convince, but none of this is works like real achievement.