You've seen it everywhere in TV and movie, you've heard it mumbled endlessly by D&D players and white light seekers...they say there are great battles everywhere in the unseen worlds, that you must be ready to fight is out at every turn.

But, when you begin to see the underpinnings of the inner workings of realty, watching the forces interact, you realize its just human nature brought to play in the stories of endless battles in the spirit world, in the gaming world, in the etherial. Human nature is to fight, until you realize that the unseen isn't out for you. The real fight is the one you put up yourself, whether because you somehow like it, are in fear, did something stupid, or just plainly are uninformed as to the deeper and greater reality you must bend to in order to see the fuller picture of a situation. 

Yes, there is fighting in nature. Yes, its good to know how to protect your physical body from harm by training to be strong and fit. This can't be helped, but generally its when another was not paying attention to the many signs of warning (and there are always many to take heed from if one would look). Or if the natural order of procreation needs a stronger seed for the next generation, when food is scarce, or in defending yourself against others who would begin fights. There will be these primal urges to do battle, but these factors are not the root of reality by any means. 

Its human nature to try to take the fight with them when looking to the unseen. And you may find a fight there, but it will almost always be the one you brought with you as a tag-along attribute of  your own human nature, folly, ignorance and unawareness. 

Don't draw your sword unless really necessary, but you won't find it necessary, when your contacts in the places you visit already know of your presence and welcome it. That is key. Pay attention to the lay of the land you tread.