A normal part of the Christian Life
"If you were of the world, the world would love its own. Yet because you are not of the world, but I chose you out of the world, therefore the world hates you....
"If they persecuted Me they will persecute you... for they do not know the One who sent Me."
See also 2 Corinthians 4:7, Matthew 24:9 and Luke 6:22-23