Jesus mentioned selling your cloak to buy a sword. The disciples apparently thought he was referring to present defense, but I think He meant something else. In a similar vein, we read about another misunderstanding concerning the literal and the metaphorical:
Matthew 16:6, 11
6 Then Jesus said to them, “Take heed and beware of the leaven of the Pharisees and the Sadducees.”
11 “How is it you do not understand that I did not speak to you concerning bread?—but to beware of the leaven of the Pharisees and Sadducees.”
I certainly don’t believe Jesus meant, “two swords will be enough to battle the crowd that is coming to arrest me.” The sword of the Spirit is the sword with which we must furnish ourselves. Our struggle is not against flesh and blood.
In Revelation 1:16, we read about “a sharp two-edged sword” coming out of Jesus’ mouth, but in Greek it is written “sharp two-mouthed sword” ( δίστομος “having a double mouth,” dis -two, and stoma -mouth). Joseph Prince has suggested that we think of it this way: the two-mouthed sword represents that the word leaves the mouth of God first, and then the word leaves your mouth second when you quote it.
We famously see the words of God used as a weapon against the devil, here:
Matthew 4:4, 7, 9-10
But He answered and said, “It is written, ‘Man shall not live by bread alone, but by every word that proceeds from the mouth of God.’ ”
Jesus said to him, “It is written again, ‘You shall not tempt the LORD your God.’
And he said to Him, “All these things I will give You if You will fall down and worship me.” Then Jesus said to him, “Away with you, Satan! For it is written, ‘You shall worship the LORD your God, and Him only you shall serve.’ ”
Like President Trump, I do believe in the freedom to buy and keep firearms–although I would like to see better enforced background checks, and a required gun safety course.
But divine protection is better. Psalm 91 is all about divine protection.