“Science, my lad, is made up of mistakes, but they are mistakes which it is useful to make, because they lead little by little to the truth.”

Science, my boy, is composed of errors, but errors that it is right to make, for they lead step by step to the truth.

In the memory of the dead all chronological differences are effaced.

What I’d like to be above all is a writer.

The Nautilus was piercing the water with its sharp spur, after having accomplished nearly ten thousand leagues in three months and a half, a distance greater than the great circle of the earth. Where were we going now, and what was reserved for the future?

Civilization never recedes; the law of necessity ever forces it onwards.

The human mind delights in grand conceptions of supernatural beings.

I believe that water will one day be employed as fuel, that hydrogen and oxygen which constitute it, used singly or together, will furnish an inexhaustible source of heat and light, of an intensity of which coal is not capable.

All great actions return to God, from whom they are derived.

Powder is but a thing of yesterday, and war is as old as the human race-unhappily.

I believe cats to be spirits come to earth. A cat, I am sure, could walk on a cloud without coming through.

On the surface of the ocean, men wage war and destroy each other; but down here, just a few feet beneath the surface, there is a calm and peace, unmolested by man

The sea is the vast reservoir of Nature. The globe began with sea, so to speak; and who knows if it will not end with it?

Well, I feel that we should always put a little art into what we do. It’s better that way.

While there is life there is hope. I beg to assert…that as long as a man’s heart beats, as long as a man’s flesh quivers, I do not allow that a being gifted with thought and will can allow himself to despair.

I say, you do have a heart!” “Sometimes,” he replied, “when I have the time.

I wanted to see what no one had yet observed, even if I had to pay for this curiosity with my life.

To not move around, observe, and analyze, in order to make the best decisions possible, was to fail as a leader and fail the team.

A leader must lead but also be ready to follow. Sometimes, another member of the team—perhaps a subordinate or direct report—might be in a better position to develop a plan, make a decision, or lead through a specific situation.

The best leaders are not driven by ego or personal agendas.

The most fundamental and important truths at the heart of Extreme Ownership: there are no bad teams, only bad leaders.

Leadership isn’t one person leading a team. It is a group of leaders working together, up and down the chain of command, to lead.

A leader should strive to be an individual of flawless character, technical competence, and moral courage.

We wrote this so that the leadership lessons can continue to impact teams beyond the battlefield in all leadership situations—any company, team, or organization in which a group of people strives to achieve a goal and accomplish a mission.

We learned that leadership requires belief in the mission and unyielding perseverance to achieve victory, particularly when doubters question whether victory is even possible.