The issue is, how can you know that you are living a good life? To what standards? Who decides that you lived a good life?
Discussion
Read Meditations.
Stoicism is commendable particularly self-control and resilience.
The good life is one lived in accordance with nature and reason .
Human reasoning is valuable but limited and fallen. The standard of goodness must come from outside ourselves.
Therefore the good life is not defined by human reason alone more-so by the will of God, who created all things.
“For all have sinned and fall short of the glory of God” Romans 3:23
The logos is revealed in the person Jesus Christ.
“In him all things hold together” Colossians 1:17
“Christ is the wisdom of God” 1 Corinthians 1:24