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A seed has to be buried before growing out  as a tree

A slingshot has to be drawn backwards before shooting forward

Gold has to go through fire before it glitters

A lot of food has to be well cooked before they taste good

A pencil has to be brushed against a sharp object before it can draw

A metal has to be beaten with a great force before it is shaped

An individual might have to go through stuff before they are fully formed!