When do we use important for and important to? What's the rule? For example:
It's important to me.
It's important for me.
What's the difference between the two sentences?
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Important to signifies a connection to the specified subject (in this case me). Important for denotes importance for a certain cause.
It's important to me! refers to something you value or hold in great esteem.
It's important for me! refers to a cause, e.g. It's important for my health/success etc.
"X is important to Y" where "Y" is a conscious entity denotes that Y values X.
My parents are important to me.
"X is important for Y" denotes that X is something that Y really needs or that Y will be severely affected by not having X. In this case "Y" does not have to be a conscious entity.
Sunlight is important for plant growth.
Water is important for survival.