"My one purpose in life is to serve as a warning to others"

This quote by Jamie Zawinski recommends that the speaker's main goal in life is to be an example of what not to do. It indicates that the speaker has actually made errors in life and wants to use those experiences to help others avoid making the very same mistakes. This quote might be interpreted as a call to action for others to gain from the speaker's mistakes and to use their experiences to make much better decisions. It might likewise be viewed as a tip to be conscious of the consequences of our actions and to believe before we act. Ultimately, this quote works as a suggestion that our actions have effects and that we need to aim to make the very best choices possible.