The world will always feel empty because it's our emotions that fill the void.
Originally, "the world is really empty, it's our emotions that make it full." A variation "the world is really empty, it's our emotions that fill it." People who feel the world is empty are often not interfacing or interacting with others, be it electronically or face to face. While face to face is better, honest communication via phones, social media or messaging apps can be as meaningful. Notice the use of the word 'honest'. Honest communication are filled with emotions. When humans are able to connect emotionally, whether it positive or negative, their worlds are no longer empty. Negative emotions have a place. It prevents us from falling prey, warning us of danger. Positive emotions are most fulfilling. The best people are able to take negativity and create positivity.