The general who wins a battle makes many calculations in his temple before the battle is fought. The general who loses a battle makes but few calculations beforehand. Thus do many calculations lead to victory, and few calculations to defeat; how much more no calculation at all! It is by attention to this point that I can foresee who is likely to win or lose.
– Sun Tzu, The Art of War, Chapter 1
Before you commit to a relationship, do you plan as if for battle? Not that you will be fighting your partner, but for the time when you and your partner will face adversities?