Galileo Galilei
Physics
Italian
1564 – 1642
376 quotes
Father of observational astronomy and modern physics
Quotes by Galileo Galilei
I am not a heretic.
Inquisition trial
1633
The Church has erred in condemning me.
Attributed post-trial
1633
My discoveries belong to the world.
Attributed
Science advances one funeral at a time.
Misattributed to Max Planck
The inertia of matter.
Two New Sciences
1638
Parabolas describe projectile motion.
Two New Sciences
1638
The speed of light is finite.
Early ideas
Heat is motion of particles.
Attributed
Sound is vibration.
Experiments
The compass is a gift to navigation.
Early work
I regret the time lost in disputes.
Personal reflection
My family is my greatest joy.
Letter to daughter
Blindness has not dimmed my spirit.
Two New Sciences (written while blind)
1638
The pursuit of truth is my life's work.
Attributed
God is the author of nature.
Letter to the Grand Duchess Christina
1615
Scripture and nature agree.
Letter to the Grand Duchess Christina
1615
Let us not mix theology with physics.
Attributed
The Inquisition fears the truth.
Attributed
1633
I kneel before the Church, but my mind is free.
Recantation
1633
History will judge me favorably.
Attributed