How can I trust God?

This week's lesson asks the question, “How can I trust God?” with suggested answers based on I Samuel17:45-46

"Then David said to the Philistine…I come to you in the name
of the Lord of hosts, the God of the armies of Israel, whom you
have defied. 46This day the Lord will deliver you into my hand…
that all the earth may know that there is a God in Israel"