One of my favorite books is The War of Art: Break Through the Blocks and Win Your Inner Creative Battles by Steven Pressfield.
In this book, Steven discusses how resistance is the primary force that keeps us from living our genius or Divine potential. He describes resistance as a repelling, negative force that keeps us from doing any number of worthwhile goals, pursuits, or positive activities such as starting or maintaining an exercise program, launching a new business, writing a book, finishing a creative project and even getting married or having a baby.
Steven refers to resistance as “the enemy within”. He says, “It is self-generated and self-perpetuated.” Resistance wants to prevent us from doing what our higher nature aspires to do. It will come up with all kinds of reasons, excuses, and distractions to stop us.