In Exodus 17:8-15, we see that the Amalekites attacked the Israelites. Joshua was fighting them while Moses held up his hands. As long as Moses’ hands were lifted, Israelites were winning. As soon as he lowers them, the Amalekites were winning.
It has been known that hand or arm raising is a way to magnify / praise God as referenced in Psalms 63:4 and 134:2. Some have deemed it as praying to God as shown in Lamentations 2:19 and 3:41. It has been known that Amalekites in the Bible symbolize the flesh or the sinful nature. Some have claimed that we; as born again, blood washed, sanctified, redeemed Christians; have three enemies. These are satan, the world, and the sinful nature. At times, the battle with the sinful nature can be more intense than the one with satan and the world combined. For the former is within, whereas; the other two are without. Just know that all battles are experienced by the majority if not all and you are not alone no matter what anyone says. If you ever find yourself in the middle of a storm and could not or would not reach out to a prayer partner, just praise Jesus Christ. Cannot praise Him? Just focus on Him. Cannot do that either? Ask Him to pray for you. “For there is one God and one mediator between God and mankind, the man Christ Jesus …” found in I Timothy 2:5. Or ask Him to have someone pray for you. Don’t be surprised if a very unlikely person approaches you days later to inform you that he or she has been praying for you. Sounds strange? True that ... but it works every time!
Be joyful always, pray continually; give thanks in all circumstances, for this is God’s will for you in Christ Jesus. I Thessalonians 5:16-18