Even a happy life cannot be without a measure of darkness, and the word happy would lose its meaning if it were not balanced by sadness. It is far better take things as they come along with patience and equanimity.
— Carl Jung
Successful Happiness Is Not Measured quotations
Success is not the key to happiness, happiness is the key to success.

To the barefoot man, happiness is a pair of shoes.
To the man with old shoes, it's a pair of new shoes. To the man with new shoes, it's stylish shoes. And of course, the fellow with no feet would be happy to be barefoot. Measure your life by what you have not by what you don't.

If you love what you are doing, you will be successful.
Not what we say about our blessings, but how we use them, is the true measure of our thanksgiving.
Persons of high self-esteem are not driven to make themselves superior to others; they do not seek to prove their value by measuring themselves against a comparative standard. Their joy is being who they are, not in being better than someone else.

Not what we say about our blessings, but how we use them, is the true measure of our thanksgiving," and the words of John Fitzgerald Kennedy tell us that, "As we express our gratitude, we must never forget that the highest appreciation is not to utter words, but to live by them.
If you believe in what you're doing, you'll be successful.
I will not close my eyes, neither those in my head nor those in my soul, as the ship carries me away, along with my future, my dreams, and my beliefs. Buru Island is no happy land somewhere; it's but a way station on my journey in life—though to believe even that much will require no small measure of hope.

American society [...] not only sanctions gross and unfair relations among men, but it encourages them. Now, can that be denied? No. Rivalry, competition, envy, jealousy, all that is malignant in human character is nourished by the system. Possession, money, property--on such corrupt standards as these do you people measure happiness and success.
Success is not rightly measured by wealth, prestige and power.
Success is measured by the yardstick of happiness.
What really matters for success, character, happiness and life long achievements is a definite set of emotional skills - your EQ - not just purely cognitive abilities that are measured by conventional IQ tests.

It is often to the wary that the events in life are unexpected.
Looser types-people who are not busy weighing and measuring every little thing-are used to accidents, coincidences, chance, things getting out of hand, things sneaking up on them. They are the happy children of life, to whom life happens for better or worse.
Happiness of any given life is to be measured, not by its joys and pleasures, but by the extent to which it has been free from suffering-from positive evil.
Your success is not measured in terms of what all you obtained but in term of what you become, how you live and what actions you do. Upon this point reflect well and attain great happiness

Its guilt therefore in these cases, is not to be measure by its effects on the happiness of mankind; nor is it to be denominated true or false glory, accordingly as the ends to which it is directed are beneficial or mischievous, just or unjust objects of pursuit; but it is false, because it exalts that which ought to be abased, and criminal, because it encroaches on the prerogative of God.
Good. There are many nights as days, and the one is just as long as the other in the year's course. Even a happy life cannot be without a measure of darkness, and the word happy would lose its meaning if it were not balanced by sadness.
You have got to convince people, the Drive-By Media, the mainstream media, is never going to support us, and if you continue to define political success as the media supporting us and not supporting a Democrat, you're never gonna be happy, because that's never going to happen. And if that remains your measure of success, then you're gonna get fooled each and every time.

What disconcerts the modern world at its very roots is not being sure, and not seeing how it ever could be sure, that there is an outcome-a suitable outcome to evolution. Half our present uneasiness would be turned to happiness if we could once make up our minds to accept the facts and place the essence and the measure of our modern cosmogonies within a noogenesis.
Will is the measure of power. To a great genius there must be a great will. If the thought is not a lamp to the will, does not proceed to an act, the wise are imbecile. He alone is strong and happy who has a will. The rest are herds. He uses; they are used. He is of the Maker; they are of the Made. Will is always miraculous, being the presence of God to men. When it appears in a man he is a hero, and all metaphysics are at fault.
I measure my success by how happy I am, not how big the business is or how much money I've made.

So they speak soothingly about progress and the greatest possible happiness, forgetting that happiness is itself poisoned if the measure of suffering has not been fulfilled.
At the beach, life is different. A day moves not from hour to hour but leaps from mood to moment. We go with the currents, plan around the tides, follow the sun. We measure happiness by nothing we can hold, nothing we can catch. Everywhere, life is jumping and elusive and momentously momentary.
Success is not rightly measured by the worldly standards of wealth, prestige and power. None of these bestow happiness unless they are rightly used. To use them rightly one must possess wisdom and love for God and man.

I guess what I'm trying to say is I don't think you can measure life in terms of years. I think longevity doesn't necessarily have anything to do with happiness. I mean happiness comes from facing challenges and going out on a limb and taking risks. If you're not willing to take a risk for something you really care about, you might as well be dead.
I who once wrote songs with keen delight am now by sorrow driven to take up melancholy measures. Wounded Muses tell me what I must write, and elegiac verses bathe my face with real tears. Not even terror could drive from me these faithful companions of my long journey. Poetry, which was once the glory of my happy and flourishing youth, is still my comfort in this misery of my old age.
Happiness begins with impeccability of the word.
The way to measure the impeccability of my word is to ask, "Am I happy or am I suffering?" If I'm suffering, then I'm not being impeccable with my word.

Such is the condition of life that something is always wanting to happiness.
In youth we have warm hopes, which are soon blasted by rashness and negligence, and great designs which are defeated by inexperience. In age, we have knowledge and prudence, without spirit to exert, or motives to prompt them; we are able to plan schemes, and regulate measures, but have not time remaining to bring them to completion.
We are apt to think we know what time is because we can measure it, but no sooner do we reflect upon it than that illusion goes. So it appears that the range of the measureable is not the range of the knowable. There are things we can measure, like time, but yet our minds do not grasp their meaning. There are things we cannot measure, like happiness or pain, and yet their meaning is perfectly clear to us.
Once more I realized to what an extent earthly happiness is made to the measure of man. It is not a rare bird which we must pursue at one moment in heaven, at the next in our minds. Happiness is a domestic bird found in our own courtyards.

The measure of happiness is merely the difference between expectations and outcomes. It is not concerned with what one possesses – it is concerned with how content one is with what one possesses.