George Berkeley was an Irish philosopher known for his immaterialist theory that individuals can only know sensations and ideas, not abstract concepts like matter, and that ideas can only exist if being perceived by minds. Berkeley believed "to be is to be perceived", that objects only exist insofar as they are perceived, and that material substance does not truly exist. He argued physical objects continue to exist because God perceives them, providing their objective reality even when unobserved by humans.

2. Esse est Percipi
“To Be Is To Be
Perceived.”

3. LIFE
 (12 March 1685 – 14 January
1753)
 also known as Bishop
Berkeley (Bishop of
Cloyne)
 Idealist
 an Irish philosopher whose
primary achievement was
the advancement of a theory
he called "immaterialism"

4.  This theory contends that individuals
can only know directly sensations and
ideas of objects, not abstractions such
as "matter". The theory also contends
that ideas are dependent upon being
perceived by minds for their very
existence, a belief that became
immortalized in the dictum, "esse est
percipi" ("to be is to be perceived")

5.  His earliest publication was on
mathematics, but the first that brought him
notice was his Essay Towards a New Theory
of Vision, first published in 1709.
 The next publication to appear was the
Treatise Concerning the Principles of Human
Knowledge in 1710, which was followed in
1713 by Three Dialogues between Hylas and
Philonous.

6. Objects and combination of such =
ideas or sensations

8. Material substance do not exist
The analysis of sensible things
yields nothing but sensible
qualities
Minds are mental substances and
No sensible quality or collection of
sensible qualities can exist without
inhering in some substance.

9.  In order for an object
to be perceived,
there must be a mind
to perceive it.
 We could not know
directly those
objects. All we can
know is what our
perceptions tell us.

10. Esse est Percipi
To Be Is To Be Perceived
•Knowledge= Sensation
•Experience the World=
Mind
•No physical world = only
the mind

11. What is the color of a
cloud?

12. Warm Hand Cold Hand
Luke
Warm
Water
inside

14.  Berkeley held that all properties of material objects exist
only in our minds (to be is to be perceived). Since physical
objects exist even when no one perceives them, then their
objective existence (when no human mind perceives them)
implies the God's existence, or, more precisely, existence of
the God's mind, Berkeley argued.}
 Material substance do not exist
 The analysis of sensible things yields nothing but
sensible qualities
 Minds are mental substances and
 No sensible quality or collection of sensible qualities
can exist without inhering in some substance.

15. COUNTER ARGUMENTS
Verdical (True) Perception
Counter Intuitive
Question of God