Luke 14:27

Whoever does not carry his own cross (expressing a willingness to endure whatever may come) and follow after Me (believing in Me, conforming to My example in living and, if need be, suffering or perhaps dying because of faith in Me) cannot be My disciple. 

Jesus is realistic when He tells believers that trials may come to the Christian. Jesus had tests on this earth and opposition from the enemy. We will have trails on this earth and resistance from the enemy. Jesus gave us the knowledge and authority to overcome those trials through faith.