The "whole world" is your six senses

The world outside is so complex and overwhelming. Trying to control the outside world is an impossible task. Luckily there is another option. You can "fit" the whole world into your six senses. Here you have more control of the outside world. The practice of mindfulness meditation trains you to contemplate on the true nature* of these six senses and to "let go" with ease.

*impermanence,suffering and non-self