Beavers are often considered perfect engineers. The dams they create out of sticks and branches, green vegetation, and mud can still raging rivers and create a unique underwater living environment. They are dedicated workers that immediately take action when humans or natural elements conspire to destroy their dams. Even dams that have been broken down repeatedly are rebuilt.
Even beavers are not perfect, as their dams do break. It might be better to think of them as tireless in their quest to create optimal survival conditions. Their dams are not works of beauty, nor is there one perfect dam-building pattern. But each dam is purposeful and functional.
Similarly, how you approach your life determines the level of your success. If you strive to do everything perfectly, chances are little or nothing you can accomplish will result in the perfect outcome you desire. But, if you work tirelessly at your life, to build and rebuild whenever necessary, and to create the best possible life for yourself, then you will accomplish much. Success is measured by your dedication to see your work through to completion, even if completion comes after several tries.
Source (modified): Morning Light: A Book of Meditations to Begin Your Day | Amy E. Dean | Hazelden Meditations