This quote uses a metaphor to illustrate the concept of prioritization and time management. The "big rocks" represent the major, most important tasks or goals in our lives. If we don’t tackle these first, we may find ourselves overwhelmed with smaller, less significant tasks (represented by pebbles or sand), leaving no room or time for the big rocks. The idea is that if we don’t prioritize and focus on our main goals first, we may never get to them.

Applying this idea to today’s world, we often find ourselves distracted by an array of small tasks or commitments, such as responding to emails, attending meetings, or scrolling through social media. These activities, while they may hold some value, often take up a disproportionate amount of our time and energy, leaving us with little to devote to our larger goals and aspirations.

In terms of personal development, this quote encourages us to identify and focus on our most important personal growth goals. Whether it’s pursuing a new career, improving a relationship, or developing a new skill, these "big rocks" should be our primary focus. Once we’ve made significant progress on these, we can then devote time to less critical tasks.

This philosophy also encourages us to be proactive rather than reactive. Instead of letting our days be dictated by minor tasks and other people’s demands, we should take control and set our own agenda. By doing so, we can ensure that we are always moving towards our most important goals, rather than being swept along by the tide of everyday distractions.