Two of the following proverbs have similar meanings. Which ones are they?

Question

Two of the following proverbs have similar meanings. Which ones are they?

Quizplus · Accepted Answer

Proverbs are short sayings that express a traditionally held truth or piece of advice.
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Elbow grease is the best polish expresses the idea that attaining the best results is done through providing hard work.
Love me, love my dog conveys the idea that in order to love someone, one must accept all faults and imperfections about that person.
Once bitten, twice shy conveys the idea that once a person has been hurt in the past, he or she is cautious in the future.
A burnt child dreads the fire expresses the idea that a person that has been harmed by something becomes more cautious about it moving forward.
Old sins cast long shadows expresses the idea that old indiscretions can continue to have future consequences.
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Once bitten, twice shy and A burnt child dreads the fire are similar because they both express that once a person has been harmed by something, they remain cautious about it going forward into the future.

Two of the Following Proverbs Have Similar Meanings. Which Ones Are They