SER or ESTAR determine the meaning of some adjectives

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Difference between ‘SER’ and ‘ESTAR’
Difference between ‘SER’ and ‘ESTAR’

Adjectives That Change Their Meaning When Used with Either SER or
ESTAR

Ser or estar determine the meaning of some adjectives. The ideas they convey are different, as you can see in the following examples. Keep in mind that your choice of ser or estar will strongly affect your message.

ser aburrido(a) to be boring estar aburrido(a)o be bored
ser bueno(a)to be goodestar bueno(a)to be attentive (in class ) 
ser listo(a) to be clever estar listo(a) to be ready
ser malo(a)to be bad estar malo(a) to be ill
ser orgulloso(a) to be conceited, vainestar orgulloso(a)to be proud
ser pálido(a) to be pale complexioned estar pálido(a)to be pale
ser rico(a) to be richestar rico(a)to be tasty
ser seguro(a) to be safeestar seguro(a) to be sure, certain
ser viejo(a) to be oldestar viejo(a) to look old
ser vivo(a) to be sharp estar vivo(a) to be alive 
Examples of Adjectives That Change Their Meaning When Used with Either SER or
ESTAR