This question sometimes rid you. But actually this relevant according to situation. one should be stable in his stand, decisions, attitudes...Even though I said one should be unstable. ...!!!Think!!!... There is lot of reason behind this thought a reaction can take place only if the reacting medium is unstable. Why human beings take food? Answer simple to be unstable or get rid away from stable state " death ". Even though stability reflect our personality sometimes it appears as a life less state. Universe has the inherent tendency to force everything inside it to state of stability. But we have to override over this inherent tendency of universe to achieve something. Power of victory or success resides in instability. The word instability itself means success. No one this world like similarity. that's why nature make our eyes unstable with difference. which means key to succes