The same law takes place in a system, consisting of many bodies, as in one single body, with regard to their persevering in their state of motion or of rest. For the progressive motion, whether of one single body or of a whole system of bodies, is always to be estimated from the motion of the center of gravity.

I can calculate the motion of heavenly bodies, but not the madness of people.

Every setback means you’re one step closer to seeing the dream come to pass.

To sit back hoping that someday, some way, someone will make things right is to go on feeding the crocodile, hoping he will eat you last – but eat you he will.

Honestly, I never really put the mic down.

What we hope ever to do with ease, we must learn first to do with diligence.

To every action there is always opposed an equal reaction.

In war there is no prize for runner-up.

I’ve written some great things. That’s a gift, but there’s consequences. Yeah, you get this great work, but you suffer. You really, really suffer.

No man ever achieved worth-while success who did not, at one time or other, find himself with at least one foot hanging well over the brink of failure.

In the world today many people rightfully feel entitled to have success and the good things in life, but they usually understand it will require sacrifice and hard work.

You have to be smart. The easy days are over.

Those who say it can’t be done are usually interrupted by others doing it.

The first amazing fact about gravitation is that the ratio of inertial mass to gravitational mass is constant wherever we have checked it. The second amazing thing about gravitation is how weak it is.

The resistance that you fight physically in the gym and the resistance that you fight in life can only build a strong character.

There are no black holes in the sense of regimes from which light can’t escape to infinity.

What I admire most about Hillary is that she never buckles under pressure. She never takes the easy way out. And Hillary Clinton has never quit on anything in her life.

When we make progress quickly, it feeds our emotions. Then, when there’s a period of waiting or we hit a plateau, we find out how committed we really are and whether we’re going to see things through to the finish or quit.

I don’t think about the end game. I’ve got lots to occupy my mind. It’s the rage that keeps me going.

We are the product of quantum fluctuations in the very early universe.

If your determination is fixed, I do not counsel you to despair. Few things are impossible to diligence and skill. Great works are performed not by strength, but perseverance.

The woods are lovely, dark and deep. But I have promises to keep, and miles to go before I sleep.

In any profession it gets to be a grind.

In some sort of crude sense, which no vulgarity, no humor, no overstatement can quite extinguish, the physicists have known sin; and this is a knowledge which they cannot lose.

‚They‘ are the people that don’t believe in you, that say that you won’t succeed. We stay away from ‚They.‘

Imagine your family finally making it from nothing to something, and finally getting things going, and finally buying a beautiful house and taking care of your children – and the next day, it’s completely all gone. Zero. Boom. Flat broke. So that’s when I had to man up.

Man will occasionally stumble over the truth, but most of the time he will pick himself up and continue on.

It is the fight alone that pleases us, not the victory.

My message to all the activists is to just keep going, and I know it really may seem impossible and hopeless sometimes – it always does – so you just have to keep going because if you try hard enough and long enough you will make a difference.

It is hard to fail, but it is worse never to have tried to succeed.

Ambition should be made of sterner stuff.

Genius always gives its best at first; prudence, at last.

Apply yourself both now and in the next life. Without effort, you cannot be prosperous. Though the land be good, You cannot have an abundant crop without cultivation.

Whatever you do, do with all your might.

I’m here. I’m not going anywhere. No matter what the injury – unless it’s completely debilitating – I’m going to be the same player I’ve always been. I’ll figure it out. I’ll make some tweaks, some changes, but I’m still coming.

The ladder of success is never crowded at the top.

Giving up smoking is the easiest thing in the world. I know because I’ve done it thousands of times.

While we should never give up our principles, we must also realize that we cannot maintain our principles unless we survive.

Most of the important things in the world have been accomplished by people who have kept on trying when there seemed to be no hope at all.

Because a thing seems difficult for you, do not think it impossible for anyone to accomplish.

Eradications are special. Zero is a magic number. You either do what it takes to get to zero and you’re glad you did it; or you get close, give up and it goes back to where it was before, in which case you wasted all that credibility, activity, money that could have been applied to other things.

Even the best teams can fail. Celebrities can fade. There is only One in whom your faith is always safe, and that is in the Lord Jesus Christ. And you need to let your faith show!

At United, there are great traditions, which you can’t buy in one or two years. They are created by victories. You need to prove again and again that you are better than the others. Manchester United have always done this, and are still doing it, so they are the best.

As a professional athlete a lot is going to be said about you – but I just try to move forward and try to achieve my goals.

Those who dare to fail miserably can achieve greatly.

I grew up where, when a door closed, a window didn’t open. The only thing I had was cracks. I’d do everything to get through those cracks – scratch, claw, bite, push, bleed. Now the opportunity is here. The door is wide open, and it’s as big as a garage.

He that can have patience can have what he will.

No one lives long enough to learn everything they need to learn starting from scratch. To be successful, we absolutely, positively have to find people who have already paid the price to learn the things that we need to learn to achieve our goals.

Any of us can be happy and have a good attitude when everything is going our way. But I believe it’s the real test of your character and of your faith to say, ‚Things are not going our way, but I’m still being good to people; I’m still attending church; I still have a good attitude.‘

It is for us to pray not for tasks equal to our powers, but for powers equal to our tasks, to go forward with a great desire forever beating at the door of our hearts as we travel toward our distant goal.

The greatest glory in living lies not in never falling, but in rising every time we fall.

In college, a loss is pretty devastating. That feeling kind of goes away in an 82-game season. You hate to lose, but you also have a lot more games to make up for it.

We are twice armed if we fight with faith.

I went through a lot of battles in high school.

Today, all physicists know from studying Einstein and Bohr that sometimes an idea which looks completely paradoxical at first, if analyzed to completion in all detail and in experimental situations, may, in fact, not be paradoxical.

I’m never gonna step away from stand-up. I can’t. That’s what got me where I am, and that’s also my muse. That’s how I stay level-headed. That’s what keeps me going.

When everything seems to be going against you, remember that the airplane takes off against the wind, not with it.

I am simply trying to struggle through life; trying to do God’s bidding.

They say it is the first step that costs the effort. I do not find it so. I am sure I could write unlimited ‚first chapters‘. I have indeed written many.

Eighty percent of success is showing up.

There has never yet been a man in our history who led a life of ease whose name is worth remembering.