Historians say David would have been about 5ft to 5ft 6 inches tall.
Goliath was 6 cubits and a span (6ft 9 inches). It’s a massive mismatch.
David has a slingshot and a few stones, Goliath has a spear with a head that weighed six hundred shekels (140lbs).
I love the confidence of David who has five stones one for Goliath and the other champions, Sippai, Lahaina we know about and there is an unnamed one found in 1 Chronicles 20:5-8.

David’s battle is between worldly confidence and trust in God’s ability.
Goliath is confident and moves forward vs 41
Goliath despises David’s weakness vs 42
Goliath arrogantly curses David by his gods vs 43
Goliath is over-confident of his victory vs 44

Then David said to the Philistine, “You come to me with a sword and with a spear and with a javelin, but I come to you in the name of the LORD of hosts, the God of the armies of Israel, whom you have defied. 1 Samuel 17:45

Incredible….

The name the LORD of hosts occurs some 261 times in the Old Testament. God is first called the LORD of hosts in 1 Samuel 1:3
The word hosts is a translation of the Hebrew word sabaoth, meaning “armies” a reference to the angelic armies of heaven. Thus, another way of saying “LORD of hosts” is “God of the armies of heaven.

Goliath does not stand a chance, but can you see who is also with you.
No; stop for a moment. Look with your spiritual eyes who is gathered around you. Does this not remind you of:
What then shall we say to these things? If God is for us, who can be against us? – Romans 8:31

Paul’s question, “who is against us?”, does not mean to suggest that we have no adversaries. Romans 8: 35-36 describes all sorts of adversaries and enemies and opposition. His point is that no adversary or enemy is of any account when God is for us. Since God is for us, to use the words of vs 28 all things work for our ultimate good, even those which our enemies intend for our ultimate harm. So comforting.

I would like to go back to one moment; when Samuel anoints David.

Then Samuel took the horn of oil and anointed him in the midst of his brothers. And the Spirit of the LORD rushed upon David from that day forward. And Samuel rose up and went to Ramah. 1 Samuel 16:13

Surely one key to defeating our giants and moving forward is found in this simple statement “and the Spirit of the LORD rushed upon David from that day forward”

Do we need a meeting to be filled with the Spirit? No. Does the world need Christians full of the Spirit at this time? Definitely yes.

Sometimes an easy conversation between friends can have ramifications far beyond what either person expects. Such was the case in the summer of 1872 near Dublin, Ireland, when two prominent evangelists were discussing ministry. The two men were the British evangelist Henry Varley and the renowned American evangelist Dwight L. Moody. Their conversation contains one of the best-remembered quotes attributed to the life and times of Moody. The remark affected him for the rest of his life.
The morning after an all-night prayer meeting, as the two men strolled around the grounds of the mansion where the meeting had been held, Varley uttered a brief but thought-provoking statement to Moody. This is how Moody recorded it in one of his diaries:
“The world has yet to see what God can do with and for and through a man who is fully and wholly consecrated to Him.” . . . A man! Varley meant any man. Varley didn’t say he had to be educated, or brilliant, or anything else. Just a man. “Well, by the Holy Spirit in me I’ll be that man” replied Moody.

Will you be that person at this time of need? Could you spend time on your knees asking God to fill you with his Spirit for the sake of your world.