"Not believing in force is the same as not believing in gravity"

In this quote, Leon Trotsky is making a comparison in between two apparently different ideas: force and gravity. He recommends that not believing in force is equivalent to not thinking in gravity. This statement highlights the importance of force in our daily lives, simply as gravity is an essential force that impacts whatever in the world. By stating that not believing in force is the exact same as not thinking in gravity, Trotsky is stressing the indisputable existence and effect of force in our world. He may also be implying that just as we can not reject the existence of gravity, we can not reject the presence and influence of force in our society.