master-work
To know how to grow old is the master work of wisdom, and one of the most difficult chapters in the great art of living. Herman Melville
I must have no fear of failure. It was my fear of failure that first kept me from attempting the Master Work. Paulo Coelho
It's only those who are persistent and willing to study things deeply, who achieve the master work. Paulo Coelho
To watch a master work at anything is a privilege. Ryan Gosling