John Emerich Edward Dalberg-Acton, 1. Baron Acton
John Emerich Edward Dalberg-Acton, 1. Baron Acton

It is they [men of science] who hold the secret of the mysterious property of the mind by which error ministers to truth, and truth slowly but irrevocably prevails. Theirs is the logic of discovery, the demonstration of the advance of knowledge and the development of ideas, which, as the earthly wants and the passions of men remain almost unchanged, are the charter of progress, and the vital spark

of history.

Samuel Adams
Samuel Adams

All men have a right to remain in a state of nature as long as they please; and in case of intolerable oppression, civil or religious, to leave the society they belong to, and enter into another.

Felix Adler
Felix Adler

Good deeds remain good, no matter whether we know how the world was made or not. Vile deeds are vile, no matter whether we know or do not know what, after death, will be the fate of the doer. We know, at least, what his fate is now, namely, to be wedded to the vileness.
The question for anyone to decide, who hesitates between good and evil, is whether he aspires to be a full-weight man, or

merely the fragment, nay, the counterfeit of a man. Only he who ceaselessly aims at moral completeness is, in the true sense, a human being.

Clay Aiken
Clay Aiken

I know this is going to sound cheesy and like I'm trying to be Miss America, but the most important responsibility a celebrity has is to set an example and be a role model. I want to make sure that no matter how long I go through this, I don't fall into the trap of changing and modifying how I do things that aren't a positive example. I want to remain somebody that the entire family can listen to

or watch.

Zhang Ailing
Zhang Ailing

In this era, the old things are being swept away and the new things are still being born. But until this historical era reaches its culmination, all certainty will remain an exception. People sense that everything about their everyday lives is a little out of order, out of order to a terrifying degree. All of us must live within a certain historical era, but this era sinks away from us like a

shadow, and we feel we have been abandoned. In order to confirm our own existence, we need to take hold of something real, of something most fundamental, and to that end we seek the help of an ancient memory, the memory of a humanity that has lived through every era, a memory clearer and closer to our hearts than anything we might see gazing far into the future. And this gives rise to a strange

apprehension about the reality surrounding us. We begin to suspect that this is an absurd and antiquated world, dark and bright at the same time. Between memory and reality there are awkward discrepancies, producing a solemn but subtle agitation, an intense but as yet indefinable struggle.

Abu Bakr al-Baghdadi
Abu Bakr al-Baghdadi

…[Be] certain that our hearts are broken on account of your leaving of your homes and your lands, and your seeking of shelter in the territory of the Rāfidah [those who reject Islamic authority] and the Kurdish atheists, and your being forced to wander the lands… So return to your lands, and remain in your homes, and seek shelter – after first seeking shelter with Allah – with your people

in the Islamic State, for you will find therein, by Allah’s permission, a warm embrace and a safe refuge. For you are our people. We defend you, your honor, and your wealth. We want you to be mighty and noble, we want you to be safe and secure…

Muhammad al-Bāqir
Muhammad al-Bāqir

Beware of sluggishness, annoyance and impatience, since they are the keys of all the evils. The person who commits sluggishness and slackness never at all discharges any rights (obligations); and the one who gets annoyed and restless, does never at all remain patient over the right

Al-Hasan al-Basrī
Al-Hasan al-Basrī

I am astonished about those people who are ordered to prepare their provisions, then the start of the journey is announced, however they remain unmindful in their vain discussions and fruitless deeds.

Clemens von Alexandria
Clemens von Alexandria

Cultivate quietness in word, quietness in deed, likewise in speech and gait; and avoid impetuous eagerness, for then the mind will remain steady, and will not be agitated by your eagerness. … For the mind, seated on high on a quiet throne looking intently towards God, must control the passions, … so that your quietness may be adorned by good proportion and your bearing may appear something

divine.

Hannes Alfven
Hannes Alfven

Students using astrophysical textbooks remain essentially ignorant of even the existence of plasma concepts, despite the fact that some of them have been known for half a century. The conclusion is that astrophysics is too important to be left in the hands of astrophysicists who have gotten their main knowledge from these textbooks. Earthbound and space telescope data must be treated by scientists

who are familiar with laboratory and magnetospheric physics and circuit theory, and of course with modern plasma theory.