Here's a breakdown:
* "You fellows know" - This implies the speaker is addressing a group of people who are familiar with the concept they are about to explain.
* "there are those voyages..." - This refers to specific journeys, which could be physical voyages, metaphorical journeys, or even just periods of time in someone's life.
* "...that seem ordered for the illustration of life..." - This means these journeys are designed to reveal something significant about the nature of existence itself. They are like lessons, examples, or stories that help us understand the complexities and truths of life.
* "...might stand a symbol existence?" - This suggests that these voyages are not merely journeys but also symbolic representations of the human condition. They become emblems of our struggles, triumphs, and ultimate purpose in life.
In essence, the sentence is pointing to the idea that some experiences are more than just events; they are powerful, symbolic journeys that offer insights into the fundamental nature of being alive.