That concept sounds simple enough, but it suggests actively approaching each day with the purpose of learning something you didn't already know, or at the very least gaining a new perspective on what you do know. To simply wander through the day without focus is to forfeit a once-in-a-lifetime opportunity to discover something new.
I suppose that a random discovery occasionally occurs without actively seeking it but, even if what is ultimately found is unexpected, odds are that some sort of activity was underway at the time. Discovery is not a spectator sport!
If you're seeking treasure, a treasure map is helpful! If it's education you're seeking, teachers, books and learning resources exist in whatever area of focus you desire. If you're seeking happiness, it helps to begin by surrounding yourself with people whose company you enjoy. From a business perspective, if you're seeking to create premier properties and build lasting relationships, that depends upon discovering ways to continuously improve the product and the client experience. There's nothing new to discover in the status quo.
What are you seeking?