The heart

Watch over your heart with all diligence. For from it flow the springs of life.

Proverbs 4:23

Heart and mind are the two most important spiritual organs that determines the course of life. Heart, not the physical heart, but the core self of our soul is the place from which all kinds of emotions spring up.
Postivie emotions such as love, mercy, faith, trust, kindness, joy, gladness, happiness etc and at the same negative emotions such as sorrow, hatred, bitterness, anger, fear, doubt and so on arises from out spiritual heart.
Heart has the power to give life or make life miserable.
Knowing this king Solomon warned us to watch over the heart with all diligence.
How do you watch over the heart? The only way to watch over it is to fill your heart with God's Word.
When doubt arises or fear grips you, God's Word from your heart will quench all such emotions and enable you to trust in the LORD, so you are filled with peace.
When sorrows or sadness springs up then God's Word will comfort and strength you.
That's why it's important that your heart is filled with God's Word, so it can trigger positive emotions all the time, which leads to life.
Do not let your heart to itself, tame your heart with God's Word, train and excercise your heart to follow God's Word and it will produce springs of life.