Pi, also noted as π, is a mathematical constant, the ratio of a circle‘s circumference to its diameter, approximately equal to 3.14159.  

In simple terms, if you took the diameter of any circle and place it on the circumference of the circle, it would fit three times, plus a little more.  The "plus" is .14 times (rounded).  

Other Constants: Values that do not change.

And God said to Moses, “I AM WHO I AM. Thus, you shall say to the children of Israel, ‘I AM has sent me to you'." 
 -----Exodus 3.14

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And above all these things put on charity, which is the bond of perfectness.
      -----Colossians 3.14

I know that whatever God does,
It shall be forever.
Nothing can be added to it,
And nothing taken from it.
    -----Ecclesiastes 3:14

I press toward the goal for the prize of the upward call of God in Christ Jesus.
     ------Philippians 3:14

But even if you should suffer for righteousness’ sake, you are blessed. “And do not be afraid of their threats, nor be troubled.”
      ------1 Peter 3:14

So, if you walk in My ways, to keep My statutes and My commandments, as your father David walked, then I will lengthen your days.
      -----1 Kings 3:14

See Also:

More or Less

The Gift of Awe

But you must continue in the things which you have learned and been assured of, knowing from whom you have learned them, and that from childhood you have known the Holy Scriptures, which are able to make you wise for salvation through faith which is in Christ Jesus.
      ------2 Timothy 3:14, 15

If I missed your favorite 3.14 biblical constant, please feel free to post.
       ------G. Hill