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