Saul replied, “You are not able to go out against this Philistine and fight him; you are only a young man, and he has been a warrior from his youth.” But David said to Saul, “Your servant has been keeping his father’s sheep. When a lion or a bear came and carried off a sheep from the flock, I went after it, struck it and rescued the sheep from its mouth. When it turned on me, I seized it by its hair, struck it and killed it. Your servant has killed both the lion and the bear; this uncircumcised Philistine will be like one of them, because he has defied the armies of the living God. The Lord who rescued me from the paw of the lion and the paw of the bear will rescue me from the hand of this Philistine.” Saul said to David, “Go, and the Lord be with you.”
1 Samuel 17:33-37 NIV
“A Christian in whom the Holy Spirit dwells is not exempt from having to experience struggle, temptations, disorderly desires, rebellious feelings… [the difference is that all these things come] upon him against his will.’ They are on the surface. Yet there is a ‘peace in the depth of their hearts. That is like a deep-ocean current always flowing steadily regardless of the wind and the waves on the surface.” –Father Raniero Cantalamessa
On the last and greatest day of the festival, Jesus stood and said in a loud voice, “Let anyone who is thirsty come to me and drink. Whoever believes in me, as Scripture has said, rivers of living water will flow from within them.” By this he meant the Spirit, whom those who believed in him were later to receive. Up to that time the Spirit had not been given, since Jesus had not yet been glorified.
John 7:37-39 NIV