Guard your heart above all else, for it determines the course of your life.

New Living Translation
Guard your heart above all else, for it determines the course of your life.American Standard Version
Keep thy heart with all diligence; For out of it are the issues of life.Berean Study Bible
Guard your heart with all diligence, for from it flow springs of life.Douay-Rheims Bible
With all watchfulness keep thy heart, because life issueth out from it. English Revised Version
Keep thy heart with all diligence; for out of it are the issues of life.King James Bible
Keep thy heart with all diligence; for out of it are the issues of life.World English Bible
Keep your heart with all diligence, for out of it is the wellspring of life.Young's Literal Translation
Above every charge keep thy heart, For out of it are the outgoings of life.Proverbs 4:23 Additional Translations ...