怀疑是智慧的开端，而非敌人。

I don't think you should ever regret anything. Everything happens for a reason.

When you're different, sometimes you don't see the millions of people who accept you for what you are. All you notice is the person who doesn't.

I predict future happiness for Americans if they can prevent the government from wasting the labors of the people under the pretense of taking care of them.

Change your focus, change your life.

I'm the worst thing since Elvis Presley, to do Black music so selfishly.

The best way to get something done is to begin.

Think wrongly, if you please, but in all cases, think for yourself.

The Liskov Substitution Principle is a fundamental concept in object-oriented programming, ensuring that derived classes can be used in place of their base classes without altering the correctness of the program.