“Working inspires inspiration. Keep working. If you succeed, keep working. If you fail, keep working. If you are interested, keep working. If you are bored, keep working.”

From Treye Green's article "Happy 35th Birthday, Aaliyah: 15 Of The Singer's Best Quotes" (15 January 2014) http://www.ibtimes.com/happy-35th-birthday-aaliyah-15-singers-best-quotes-1542245
Attributed

Orange County Register, July 9, 1999
Context: You just have to keep trying to do good work, and hope that it leads to more good work. I want to look back on my career and be proud of the work, and be proud that I tried everything. Yes, I want to look back and know that I was terrible at a variety of things.

https://www.nytimes.com/2007/03/20/business/20backus.html

https://www.youtube.com/watch?v=bNQTPE7gomU Kemi explains how the government needs to report to its people and let them know what they are doing.

Source: Sex and the City

Source: Your Job-Hunt Ltd – Advice from an Award-Winning Asian Headhunter (2003), Successful Recruitment in a Week (2012) https://books.google.ae/books?id=p24GkAsgjGEC&printsec=frontcover&dq=nigel+cumberland&hl=en&sa=X&ved=0ahUKEwjF75Xw0IHNAhULLcAKHazACBMQ6AEIGjAA#v=onepage&q=nigel%20cumberland&f=false, Managing Teams in a Week (2013) https://books.google.ae/books?id=qZjO9_ov74EC&printsec=frontcover&dq=nigel+cumberland&hl=en&sa=X&ved=0ahUKEwjF75Xw0IHNAhULLcAKHazACBMQ6AEIIDAB#v=onepage&q=nigel%20cumberland&f=false, Secrets of Success at Work – 50 techniques to excel (2014) https://books.google.ae/books?id=4S7vAgAAQBAJ&printsec=frontcover&dq=nigel+cumberland&hl=en&sa=X&ved=0ahUKEwjF75Xw0IHNAhULLcAKHazACBMQ6AEIJjAC#v=onepage&q=nigel%20cumberland&f=false, p.5

Source: A is for Alibi

Attributed to Edward Everett Hale in: United States. President (1922). Addresses of the President of the U.S. and the Director of the Bureau of the Budget. p. 80