Positive image takes series of consistent action but to destroy it needs just one reaction.In order to build up an image which is a positive one, we need to perform action which is consistently same or better than the previous one but when it comes to destruction it just needs one reaction.
Most of us watxh cricket and we form an image of the player based on his consistent performance in the match but one bad performance and we start to doubt him. In a game the opposite team always tries to provoke a good player while batting or bowling to extract a reaction from him and thereby commit a mistake. It's just a matter of one reaction. In a game one mistake can cost the team win or lose. So the player is expected to be intensely focused only on his game and not react when provoked.
In our life also we should remain focused on our work and duty and should always perform in the best way possible and build an image with positive actions as it will take only one reaction that can destroy all the good work we have done.
Out life is just like a cricket match, highly competitive, exciting, and at the same time on the edge, one mistake is all that it takes to undo all the good work done.