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Parmenides (515 BC -) was Greek philosopher best known for his poem On Nature and his theory that everything is one. Wikipedia says,
"And it is all one to me. Where I am to being; for I shall return there again." (Of Nature)
"[What exists] is now, all at once, one and continuous... Nor is it divisible, since it is all alike; nor is there any more or less of it in one place which might prevent it from holding together, but all is full of what is." (Of Nature)
"How could what is perish? How could it have come to be? For if it came into being, it is not; nor is it if ever it is going to be. Thus coming into being is extinguished and destruction unknown." (Of Nature)
"For it is the same thing that can be thought and that can be." (Quoted in Enneads by Plotinus)
"For to be aware and to be are the same." (Of Nature)
"We can speak and think only of what exists." (AZQuotes.com)
Parmenides (515 BC -) was Greek philosopher best known for his poem On Nature and his theory that everything is one. Wikipedia says,
"[Parmenides] explains how all reality is one, change is impossible, existence is timeless, uniform and necessary... This is generally considered to be one of the first digressions into the philosophical concept of being..." (Wikipedia: Parmenides, 8.19.21 UTC 13:51)The rest of this post is some quotes from Parmenides.
All is one
"And it is all one to me. Where I am to being; for I shall return there again." (Of Nature)
"[What exists] is now, all at once, one and continuous... Nor is it divisible, since it is all alike; nor is there any more or less of it in one place which might prevent it from holding together, but all is full of what is." (Of Nature)
"How could what is perish? How could it have come to be? For if it came into being, it is not; nor is it if ever it is going to be. Thus coming into being is extinguished and destruction unknown." (Of Nature)
Idealism
"For it is the same thing that can be thought and that can be." (Quoted in Enneads by Plotinus)
"For to be aware and to be are the same." (Of Nature)
"We can speak and think only of what exists." (AZQuotes.com)