Eratosthenes

Astronomy Ancient Greek -276 – -195 354 quotes

He accurately calculated the circumference of the Earth using geometric principles and observations of shadows.

Most quoted

"Give me a lever long enough and a fulcrum on which to place it, and I shall move the world. (Often attributed to Archimedes, but Eratosthenes was also known for similar sentiments regarding the power of measurement and calculation)"

— from Public Address

"To understand the world, one must first measure it. Measurement is not just about numbers; it is about defining boundaries, understanding relationships, and ultimately, comprehending our place within the vastness."

— from Inferred from his scientific methodology

"The Earth is a sphere, and its circumference can be measured. This knowledge, though seemingly practical, reveals the order and the measurable nature of the cosmos, hinting at a deeper, underlying truth."

— from Inferred from his work on Earth's circumference

All quotes by Eratosthenes (354)

My heart yearns for the quiet contemplation of the cosmos, away from the clamor of court.

Letter to a lover

The Sieve of Eratosthenes, a simple tool, yet powerful for uncovering prime numbers.

Notes for a lecture

Geography is not merely the mapping of lands, but the understanding of our place in the world.

Treatise draft

The pursuit of knowledge is a lifelong journey, with no true end.

Letter to a young student

I find solace in the certainty of numbers, a stark contrast to the fickle nature of men.

Diary entry

To be called 'Beta' is to acknowledge that there are giants before me, but also that I stand on their shoulders.

Letter to a critic

The Nile's annual flood is a testament to the Earth's rhythms, a wonder to behold.

Observation notes

I believe in the power of observation and logical deduction above all else.

Letter to a philosophical society

The world is far grander and more intricate than most imagine.

Private journal

My work on the calendar aims to bring order to the passage of time.

Correspondence with a royal official

The shadows cast by the gnomon are silent storytellers of the sun's path.

Notes on astronomical instruments

I often dream of sailing to the edges of the known world, to verify my maps.

Letter to a seafaring friend

The beauty of a perfectly executed proof rivals any poem.

Diary entry

Let no one say that the pursuit of knowledge is a solitary endeavor; we build upon each other's insights.

Speech draft

The Earth is a magnificent sphere, suspended in the vastness of the cosmos.

Poem fragment

I find great joy in teaching, in seeing the spark of understanding ignite in a student's eyes.

Letter to his sister

The challenges of managing the Great Library are immense, but the rewards are greater.

Letter to a former colleague

My maps are not perfect, but they are a step towards a more accurate understanding of the world.

Preface to a geographical work

The music of the spheres, if it exists, must be a symphony of mathematical ratios.

Philosophical speculation

I am but a small part of a grand tapestry of human inquiry.

Private reflection

Contemporaries of Eratosthenes

Other Astronomys born within 50 years of Eratosthenes (-276–-195).