You should pray for a healthy mind in a healthy body.
Ask for a stout heart that has no fear of death,
and deems length of days the least of Nature's gifts
that can endure any kind of toil,
that knows neither wrath nor desire and thinks
the woes and hard labors of Hercules better than
the loves and banquets and downy cushions of Sardanapalus.
What I commend to you, you can give to yourself;
For assuredly, the only road to a life of peace is virtue.

A sound mind in a sound body, is a short, but full description of a Happy state in this World: he that has these two, has little more to wish for; and he that wants either of them, will be little better for anything else.

A sound mind in a sound body, is a short, but full description of a happy state in this world. He that has these two, has little more to wish for; and he that wants either of them, will be but little the better for anything else. Men’s happiness or misery is most part of their own making. He, whose mind directs not wisely, will never take the right way; and he, whose body is crazy and feeble, will never be able to advance in it.

Ask for a valiant heart which has banished the fear of death, which looks upon the length of days as one of the least of nature's gifts; which is able to suffer every kind of hardship, is proof against anger, craves for nothing, and reckons the trials and gruelling labours of Hercules as more desirable blessings than the amorous ease and the banquets and cushions of Sardanapallus. The things that I recommend you can grant to yourself.

A sound and energetic mind is only found in a sound and energetic body.

Desiderata
GO PLACIDLY amid the noise and the haste, and remember what peace there may be in silence. As far as possible, without surrender, be on good terms with all persons.

Speak your truth quietly and clearly; and listen to others, even to the dull and the ignorant; they too have their story.

Avoid loud and aggressive persons; they are vexatious to the spirit. If you compare yourself with others, you may become vain or bitter, for always there will be greater and lesser persons than yourself.

Enjoy your achievements as well as your plans. Keep interested in your own career, however humble; it is a real possession in the changing fortunes of time.

Exercise caution in your business affairs, for the world is full of trickery. But let this not blind you to what virtue there is; many persons strive for high ideals, and everywhere life is full of heroism.

Be yourself. Especially do not feign affection. Neither be cynical about love; for in the face of all aridity and disenchantment, it is as perennial as the grass.

Take kindly the counsel of the years, gracefully surrendering the things of youth.

Nurture strength of spirit to shield you in sudden misfortune. But do not distress yourself with dark imaginings. Many fears are born of fatigue and loneliness.

Beyond a wholesome discipline, be gentle with yourself. You are a child of the universe no less than the trees and the stars; you have a right to be here.

And whether or not it is clear to you, no doubt the universe is unfolding as it should. Therefore be at peace with God, whatever you conceive Him to be. And whatever your labors and aspirations, in the noisy confusion of life, keep peace in your soul. With all its sham, drudgery and broken dreams, it is still a beautiful world. Be cheerful. Strive to be happy.

To endure all things, with an equable and peaceful mind, not only brings with it many blessings to the soul; but it also enables us, in the midst of our difficulties, to have a clear judgment about them, and to minister the fitting remedy for them.

Quiet the mind and the soul will speak

O SON OF SPIRIT! My first counsel is this: Possess a pure, kindly and radiant heart, that thine may be a sovereignty ancient, imperishable and everlasting.

"People who have a religion should be glad, for not everyone has the gift of believing in heavenly things. You don't necessarily even have to be afraid of punishment after death; purgatory, hell, and heaven are things that a lot of people can't accept, but still a religion, it doesn't matter which, keeps a person on the right path. It isn't the fear of God but the upholding of one's own honor and conscience. How noble and good everyone could be if, every evening before falling asleep, they were to recall to their minds the events of the while day and consider exactly what has been good and bad. Then, without realizing it you try to improve yourself at the start of each new day; of course, you achieve quite a lot in the course of time. Anyone can do this, it costs nothing and is certainly very helpful. Whoever doesn't know it must learn and find by experience that: "A quiet conscience mades one strong!

Cho. O mortal, who hast desired great wisdom from us!
How happy will you become among the Athenians and among
the Greeks, if you be possessed of a good memory, and be
a deep thinker, and endurance of labour be implanted in
your soul, and you be not wearied either by standing or
walking, nor be exceedingly vexed at shivering with
cold, nor long to break your fast, and you refrain from
wine, and gymnastics, and the other follies, and
consider this the highest excellence, as is proper a
clever man should, to conquer by action and counsel, and
by battling with your tongue.

Go placidly amid the noise and the haste, and remember what peace there may be in silence. As far as possible without surrender, be on good terms with all persons. Speak your truth quietly and clearly, and listen to others, even the dull and ignorant; they too have their story. Be yourself. Especially do not feign affection. Neither be cynical about love – for in the face of all aridity and disenchantment it is perennial as the grass. Take kindly the counsel of the years, gracefully surrendering the things of youth. Nurture strength of spirit to shield you from misfortune. But do not distress yourself with imaginings. Many fears are born of fatigue and loneliness. Beyond a wholesome discipline, be gentle with yourself. You are a child of the universe no less than the trees and the stars; you have a right to be here. And whether or not it is clear to you, no doubt the universe is unfolding as it should. Therefore be at peace with God, whatever you conceive Him to be, and whatever your labours and aspirations, in the noisy confusion of life keep peace with your soul. With all its sham, drudgery and broken dreams, it is still a beautiful world.

A PRAYER The supreme prayer of my heart is not to be learned, rich, famous, powerful, or “good,” but simply to be radiant. I desire to radiate health, cheerfulness, calm courage and good will. I wish to live without hate, whim, jealousy, envy, fear. I wish to be simple, honest, frank, natural, clean in mind and clean in body, unaffected — ready to say “I do not know,” if it be so, and to meet all men on an absolute equality — to face any obstacle and meet every difficulty unabashed and unafraid. I wish others to live their lives, too — up to their highest, fullest and best. To that end I pray that I may never meddle, interfere, dictate, give advice that is not wanted, or assist when my services are not needed. If I can help people, I’ll do it by giving them a chance to help themselves; and if I can uplift or inspire, let it be by example, inference, and suggestion, rather than by injunction and dictation.

That person then, whoever it may be,” Cicero wrote in Tusculan Disputations, “whose mind is quiet through consistency and self-control, who finds contentment in himself, who neither breaks down in adversity nor crumbles in fright, nor burns with any thirsty need nor dissolves into wild and futile excitement, that person is the wise one we are seeking, and that person is happy.