“No plan survives contact with the enemy.” -Tommy Franks
The fog of war blinds all, muffles the sounds and confuses those on the front lines and behind them issuing orders.
Nothing goes according to plan.
The Spanish Armada was destroyed by storms, Mother Nature proving that mere men are naught before her. Napoleon and Hitler both discovered this with Russian cold.
Companies had product launches scheduled for the afternoon of 9/11/2001. People on those planes had plans that night.
The Universe cares not for the plans of humans. We must therefore develop the power of resilience, the ability to survive and adapt whether it is changing economic conditions, relationships, or other external forces that lay waste the best laid plans of mice and men. Only then may we be reasonably certain that no matter what, we will see another day.