1 Timothy 6:6

But godliness actually is a source of great gain when accompanied by contentment (that contentment which comes from a sense of inner confidence based on the sufficiency of God).

We were never designed to carry the burden of life on our shoulders.  God wanted to walk with us and guide us through this life.  Adam changed the original plan.  Jesus restored to us the possibility of living a contented life again, guided by God in our spirit.