Galileo Galilei

Physics Italian 1564 – 1642 376 quotes

Father of observational astronomy and modern physics

Quotes by Galileo Galilei

Persistence in the face of opposition.

Personal reflection

The Medici supported my work.

Dedication 1610

Florence is the cradle of science.

Attributed

My students carry the torch.

Letter

The future belongs to the bold.

Attributed

Nature laughs at human folly.

Attributed

Books are the children of the mind.

Attributed

Debate sharpens the intellect.

Dialogue 1632

The cosmos is a grand machine.

Attributed

Light travels in straight lines.

Optics work

Colors are in the light.

Experiments

The floatation of bodies depends on density.

Discourse on Floating Bodies 1612

Ice is lighter than water.

Discourse on Floating Bodies 1612

Surfaces determine buoyancy.

Discourse on Floating Bodies 1612

My method is demonstration from principles.

Attributed

Hypotheses must be tested.

Attributed

The Academy of Sciences owes much to me.

Lyncean Academy

Friends like Sagredo inspire.

Correspondence

Vincenzo is a worthy successor.

Letter to son

Maria Celeste, my beloved daughter.

Letters to Daughter 1634