I urge you, brothers and sisters, by the mercies of God,
to offer your bodies as a living sacrifice,
holy and pleasing to God, your spiritual worship.
Do not conform yourselves to this age
but be transformed by the renewal of your mind,
that you may discern what is the will of God,
what is good and pleasing and perfect.

Epistle of St. Paul: Ephesians chapter 1

Jesus began to show his disciples
that he must go to Jerusalem and suffer greatly
from the elders, the chief priests, and the scribes,
and be killed and on the third day be raised. 
Then Peter took Jesus aside and began to rebuke him,
“God forbid, Lord! No such thing shall ever happen to you.” 
He turned and said to Peter,
“Get behind me, Satan! You are an obstacle to me. 
You are thinking not as God does, but as human beings do.”

Then Jesus said to his disciples,
“Whoever wishes to come after me must deny himself,
take up his cross, and follow me. 
For whoever wishes to save his life will lose it,
but whoever loses his life for my sake will find it.
What profit would there be for one to gain the whole world
and forfeit his life? 
Or what can one give in exchange for his life? 
For the Son of Man will come with his angels in his Father’s glory,
and then he will repay all according to his conduct.”

Gospel of Matthew chapter 16