Seed

Think twice before you speak, because your words and influence will plant the seed of either success or failure in the mind of another.
~ Napoleon Hill 

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Some seeds lie dormant for years before the grow into something.  Do they think and think about the time they are wasting waiting for their moment to come?  Do they stress about what they are missing or what they could be doing instead of waiting?  Do they have tremendous anxiety about what their futures hold?  Is their growth stunted by their worries?  Do they worry that they worry too much?  Do they weigh the benefits of BEing against the benefits of DOing?

No.  Seeds don't really have brains.