Real knowledge is to know the extent of one's ignorance.

The only limit to our realization of tomorrow will be our doubts of today.

‘Someday’ is a disease that will take your dreams to the grave with you.

Unless you try to do something beyond what you have already mastered, you will never grow.

No one can whistle a symphony. It takes a whole orchestra to play it.

The ladder of success is best climbed by stepping on the rungs of opportunity.

The best way to predict your future is to create it.