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