The Importance of Prayer - C.H. Spurgeon

So his hands were steady until the going down of the sun.
Exodus 17:12

The prayer of Moses was so mighty that everything depended upon it. The petitions of Moses disconcerted the enemy more than the fighting of Joshua. Yet both were needed. In the soul's conflict, force and fervor, decision and devotion, valor and vehemence must join their forces, and all will be well.

You must wrestle with your sin, but the major part of the wrestling must be done alone in private with God. Prayer like Moses' holds up the token of the covenant before the Lord. The rod was the emblem of God's working with Moses, the symbol of God's government in Israel. Learn, praying saint, to hold up the promise and the oath of God before Him. The Lord cannot deny His own declarations. Hold up the rod of promise, and have what you seek.

Moses grew tired, and then his friends assisted him. Whenever your prayer loses vigor, let faith support one hand, and let holy hope lift up the other, and prayer seating itself upon the stone of Israel, the rock of our salvation, will persevere and prevail. Beware of growing faint in your devotion.

If Moses felt it, who can escape? It is far easier to fight with sin in public than to pray against it in private. It has been observed that while Joshua never grew weary in the fighting, Moses did grow weary in the praying; the more spiritual an exercise, the more difficult it is for flesh and blood to maintain it.

Let us cry, then, for special strength, and may the Spirit of God, who helps our weaknesses as He helped Moses, enable us like him to continue with our steady hands "until the going down of the sun," until the evening of life is over, until we shall come to the rising of a better sun in the land where prayer is swallowed up in praise.