To remain a credible leader, I must always work first, hardest, and longest on changing myself. This is neither easy nor natural, but it is essential.

Teaching was the hardest work I had ever done, and it remains the hardest work I have done to date.

The best wisdom comes from the hardest struggle.

In life, all good things come hard, but wisdom is the hardest to come by.

Valentine's Day is the hardest day of the year for a woman to get out, but everybody who is anybody and single is out that night.

Risk! Risk anything! Care no more for the opinions of others, for those voices. Do the hardest thing on earth for you. Act for yourself. Face the truth.

The hardest thing to do is to trust people.

The hardest part is to travel, and to be away from your family.

My parents are the hardest-working people I ever knew: they always worked every day, all day; they had to come up with the solutions to make things work. And I think that work ethic, maybe stubbornness, single-mindedness, definitely played a role for me. I'm definitely thankful for my roots.

The hardest arithmetic to master is that which enables us to count our blessings.

If you want to devote yourself to the arts, you'd better do it strictly from passion, because there is zero guarantee that you'll get anywhere. The hardest thing is dealing with business people who have nothing to do with your art. They could care less that you're up at 4:30 in the morning writing a joke. Don't expect any sympathy from anybody.

I think loss of loved ones is the hardest blow in life.

The hardest part of fame and success is adapting to the people around you that's changing. It changes the way people look at you from how they used to look at you. They listen to you on the radio, they look at you on TV and when people speak on you in a good light, you have a couple people who hold grudges.

I'm always asked, 'What's the secret to success?' But there are no secrets. Be humble. Be hungry. And always be the hardest worker in the room.

The hardest thing to find in life is balance - especially the more success you have, the more you look to the other side of the gate. What do I need to stay grounded, in touch, in love, connected, emotionally balanced? Look within yourself.

Boxing, mixed martial arts and tennis are the hardest sports to train for.

It is boorish to live ungraciously: the giving is the hardest part; what does it cost to add a smile?

I have witnessed the softening of the hardest of hearts by a simple smile.

The question I love to get asked is: 'What's the hardest part of your job?' And literally, the answer is probably real sad, but it's to just to be me. Like, it's really hard, because I think people, you know, have a set idea of what a pop star should be.

The hardest thing is at the end you have to say bye to all these people who you have worked with for so many months. It was really sad not to see them anymore. But you have the parties that you go to and you get to see them, like the premieres and the screenings.

I'm incredibly sad that my mother's not here to see my kids and that my kids don't get to know her. And she didn't meet my husband. That's one of the hardest things. I don't even know how to put that into words.

The hardest thing to get is true emotion. I always believe you need to earn that with the audience. You can't just tell them, 'Ok, be sad now.'

I started ballet in my early 20s. I studied for about ten years. Ballet is probably the one of the hardest things I've done, almost like MMA. People don't give it a lot of credit and think it's easy, but it's very difficult. For an athlete, you use muscles you really don't use, and ballet is something I really respect.

The easiest kind of relationship for me is with ten thousand people. The hardest is with one.