No horse gets anywhere until he is harnessed. No stream or gas drives anything until it is confined. No Niagara is ever turned into light and power until it is tunneled. No life ever grows great until it is focused, dedicated, disciplined.

Summary

This quote emphasizes the importance of restraint and discipline in achieving success. It suggests that just like a horse needs to be harnessed or a stream needs to be confined, individuals need to focus their efforts and dedicate themselves to a particular goal in order to make progress. Furthermore, the quote implies that potential and energy are not enough on their own; they need to be channeled and directed, symbolized by the reference to Niagara being turned into light and power through tunnels. Ultimately, the message is that greatness requires a combination of focus, dedication, and discipline.