Sayings With Canoes What Are Sayings Called That Use The Same Word But Change The Meaning From The Start Of The Phrase To The End?

What are sayings called that use the same word but change the meaning from the start of the phrase to the end? - sayings with canoes

Example:
The meaning of life is to live with a goal.

Example:
Because the sky is the limit for me, the sky is the limit.

What are these kinds of sentences and words mean? For example, GNU is a recursive formulation, ie, the GNU's Not Unix.