Ser vs Estar in Spanish: Using ser in Spanish (not estar) to express an essential characteristic
Ser vs Estar in Spanish: essential characteristics
When we want to describe an essential characteristic of something or someone we use the verb ser (not estar).
For example:
In the examples above, we use ser to talk about physical descriptions.
In the examples above, we use ser to talk about the character/personality.
Note that we use ser for characteristics that we see as part of what someone or something is; We use ser to describe characteristics that we see as part of a person or thing's identity or nature. These characteristics don’t have to be permanent forever. What matters is that we are describing what someone or something is like, rather than how they are at a particular moment.
Ana might become shorter when she gets older, Pedro might become more confident and the café might lower its prices. That doesn't stop us from using ser. At the time we're describing them, we see these characteristics as part of what they are like, not as a temporary state or condition.
However we can also describe using estar, but this use is more to convey a "result":
Sofía es muy alta vs Sofía está muy alta
Sofía es alta. (Sofía is tall.)
Sofía está alta. (Sofía has grown tall / Sofía is tall now.)
Sofía es alta simply describes Sofía as a tall person. We're presenting her height as one of her general physical characteristics, without suggesting that anything has changed.
Sofía está alta, however, conveys a different idea. Imagine Sofía is your daughter, and a friend who hasn't seen her for a long time meets her again and exclaims:
"¡Sofía está muy alta!" (Sofía has grown so tall!)
Here, your friend isn't simply describing Sofía as a tall girl. She's noticing how much Sofía has grown since the last time she saw her. The use of estar highlights the result of that change: Sofía is now much taller than your friend remembers her.
So, while ser presents height as a general characteristic, estar can draw attention to someone's current appearance as the result of a change.
See also Ser vs Estar in Spanish: Using estar (not ser) when talking about physical condition of something, someone or a place and Conjugate ser in the present tense in Spanish (El Presente)
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