Leviticus 17:11 says that the life is in the blood. So our body is being kept alive by our heart pump, the cardia, pumping our blood around.
What keeps our spirit alive? It doesn't have any blood. The spirit is the true you, living in your body. So what does keep our spirit alive?
Jesus said, "It is the (Holy) Spirit that quickeneth (makes alive), the flesh profits nothing." The only reason that we have our flesh body is so that we can stay on this Earth and accomplish that what God wants done here.
Jesus said, "The words that I speak unto you ... they are Spirit and they are Life." What is the Life of our spirit man? God's Word! God's Word is Life! Your spirit man ... YOU ... are kept alive by the Word of God that's put in you. when you study the Word, you are feeding your spirit man.
You feed your flesh regularly, right? Three good meals a day, plus some snacking in between, and sometimes a snack before bedtime. How often do you feed your spirit man ... the TRUE you ... the Word of God? You should at least feed your spirit once daily, plus before you start your day and before you go to bed at night. That's a good three times a day.
Reverend Robert W. & Mary C. Butler