“Fortune is unstable, while our will is free.”

XXXI.
Panegyricus

On Tranquility of the Mind
Context: We are all chained to fortune: the chain of one is made of gold, and wide, while that of another is short and rusty. But what difference does it make? The same prison surrounds all of us, and even those who have bound others are bound themselves; unless perchance you think that a chain on the left side is lighter. Honors bind one man, wealth another; nobility oppresses some, humility others; some are held in subjection by an external power, while others obey the tyrant within; banishments keep some in one place, the priesthood others. All life is slavery. Therefore each one must accustom himself to his own condition and complain about it as little as possible, and lay hold of whatever good is to be found near him. Nothing is so bitter that a calm mind cannot find comfort in it. Small tablets, because of the writer's skill, have often served for many purposes, and a clever arrangement has often made a very narrow piece of land habitable. Apply reason to difficulties; harsh circumstances can be softened, narrow limits can be widened, and burdensome things can be made to press less severely on those who bear them cleverly.

Announcing the introduction of the iPhone, as quoted in Apple unveils cell phone, Apple TV http://www.msnbc.msn.com/id/16542805/ (9 January 2007)
2000s

Source: The Alloy of Law

In Our Youth Our Hearts Were Touched With Fire (1884)
Context: We know that, if the armies of our war did anything worth remembering, the credit belongs not mainly to the individuals who did it, but to average human nature. We also know very well that we cannot live in associations with the past alone, and we admit that, if we would be worthy of the past, we must find new fields for action or thought, and make for ourselves new careers.
But, nevertheless, the generation that carried on the war has been set apart by its experience. Through our great good fortune, in our youth our hearts were touched with fire. It was given to us to learn at the outset that life is a profound and passionate thing. While we are permitted to scorn nothing but indifference, and do not pretend to undervalue the worldly rewards of ambition, we have seen with our own eyes, beyond and above the gold fields, the snowy heights of honor, and it is for us to bear the report to those who come after us.

Aemilius, sec. 27
Parallel Lives

IX. On Providence, Fate, and Fortune.
On the Gods and the Cosmos

Source: Dream of the Red Chamber (1958), pp. 13–14

Runs and Catches: an autobiography (1980), ISBN: 9780571115655.