Matters of the heart can mean many things, one being an actual heart attack where the heart is physically endangered and/or damaged. It can also mean that from the heart flows life, not only physical but emotional life…and life is definitely an emotional experience.
Here is some biblical advice concerning the heart:
Above all else, guard your heart, for it is the wellspring of life. Proverbs 4:23 NIV
Create in me a pure heart, oh God, and renew a steadfast spirit within me. Psalm 51:10 NIV
I will give you a new heart and put a new spirit in you; I will remove your heart of stone and give you a heart of flesh. Ezekiel 36:26 NIV
As water reflects a face so a man’s heart reflects the man. Proverbs 27:19 NIV
…love one another deeply, from the heart. 1 Peter 1:22 NIV
There are so many more to do with loving the Lord and each other, but these few were weighing on my heart. There are so many lessons to be learned in life and I believe that having a loving heart opens us to each new learning experience whereas a closed heart, as the Bible says, a heart of stone, closes us to them.