Finally, my brethren, be strong in the Lord and in the power of His might. Put on the whole armor of God, that you may be able to stand against the wiles of the devil. … Therefore take up the whole armor of God, that you may be able to withstand in the evil day, and having done all, to stand. … above all, taking the shield of faith with which you will be able to quench all the fiery darts of the wicked one. (Ephesians 6:10-16)
A theme we see play out in the Bible over and over again is that God doesn’t call strong people, God makes people He calls strong. We don’t have to worry if we aren’t strong when He asks us to do things, because God is strong when we spend time with Him. During that time, He renews our strength.
But those who wait on the Lord Shall renew their strength; They shall mount up with wings like eagles, They shall run and not be weary, They shall walk and not faint (Isaiah 40:31).
God’s call includes the abilities we need to live out His plans. When God calls us to be strong, He gives us the path, the promise, and the principles to become strong. In Ephesians 6, Paul’s use of the Roman infantry soldier’s armor is an illustration of spiritual truths that bring strength and life to those that wear it.