Persistence is important in ...

Persistence is important in every endeavor. Whether it's finishing your homework, completing school, working late to finish a project, or "finishing the drill" in sports, winners persist to the point of sacrifice in order to achieve their goals.
 Leon F. "Lee" Ellis

Quotes from the same author

Affirming others isn't 'flattering' them-it's when you genuinely and consistently acknowledge their efforts and accomplishments, both large and small. Make affirmation a habit and watch what happens!
 Leon F. "Lee" Ellis
Professional accountability is a good thing. Without it, excellence is merely a pipe dream and even average performance isn't a realistic expectation.
 Leon F. "Lee" Ellis