唯一
The only person you should try to be better than is the person you were yesterday.
The only limits you have are the ones you set for yourself.
The only way to improve is to challenge yourself against the best.
The only way to achieve your goals is to work hard and never give up.
The only limit is the one you set yourself.
The only way to do great work is to love what you do.
The only thing you can do is give all you have on that particular day.
The only valid data for psychology are the reports of trained observers.
Introspection is the only method by which the mind can be directly observed.
The only person you should try to be better than is the person you were yesterday.
The only way to have a friend is to be one.
The only limits that exist are the ones in your mind.
The only way to do great work is to love what you do.
The only way to get better is to compete against the best.
"The only way to get better is to play against the best."
"The only way to get better is to compete against the best."
"The only way to win is to suffer."
The only time I’m truly happy is when I’m in the water.
I'm alive and I have a chance to do something with my life. That's the only motivation I need.