Elements
Scientifically speaking there are 4 basic elements that humans need to survive.
1) Water.
2) Food.
3) Air.
4) Light.
The Word of God tells us that:
1) Jesus offers Living Water so we will never thirst again. (John 4:14)
2) Jesus said He is the Bread of Life so we will never hunger again. (John 6:35)
3) Jesus gave us the Breath of Life when He formed us. (Genesis 2:7, Colossians 1:16)
4) Jesus said that He is the Light of the world. (John 9:5)
In addition, the scriptures tell us that Jesus created all things by His Word, He holds all things together by His Word, and all things will be destroyed by His Word. (John 1:3, Colossians 1:16, 2 Peter 3:5-7).
So scientifically speaking we need Jesus to live.
It is by the grace of God that we are saved (Ephesians 2:8-9) but it is also that same grace that empowers us to daily live out the Christian life. There is no sin too great and no shame too strong that the mercy of God cannot cover it. If you are living your life without Jesus today, I urge you to turn to Him. You can read more about the Gospel of Jesus here.