Starting a company or working for yourself is often filled with highs and lows, a roller coaster of emotions, doubt and sometimes failure. Ask any successful entrepreneur and they’ll tell you there is one phrase that has stuck with them throughout the years and has kept them inspired throughout their journey. We've compiled some of our favorite words of inspiration to encourage you to keep at it.“Entrepreneurship is living a few years of your life like most people won’t so you can spend the rest of your life like most people can’t.”– Warren G. Tracy’s student“Success is not the key to happiness. Happiness is the key to success. If you love what you are doing, you will be successful.”– Albert Schweitzer“Most great people have attained their greatest success just one step beyond their greatest failure.”– Napoleon Hill

“Leaders don’t force people to follow; they invite them on a journey.”– Charles S. Lauer“As long as you’re going to be thinking anyway, think big.”– Donald Trump“Every single person I know who is successful at what they do is successful because they love doing it.”– Joe Penna

“Once you say you’re going to settle for second, that’s what happens to you in life.”– John F. Kennedy“Business opportunities are like buses, there’s always another one coming.”– Richard Branson“The only place where success comes before work is in the dictionary.”– Vidal Sassoon

"We led with our conviction rather than rational, because rational said it was impossible."– Daniel Ek"If you don't define yourself and proactively maintain your identity, someone else will do it for you. The idea that you can be invisible is a myth."– Patrick Ambron“You must fall in love with what you do, because being an entrepreneur is a lot of hard work, and overcoming a lot of adversity. From that love will come the dedication that will get you out of bed at 4 a.m. because of a great idea you just had and get you to work till 11 p.m. and not feel tired.”– Ken FieldHave a favorite quote that motivates you? Share what keeps you inspired.