Believers can strengthen the hands of the wicked by approving of their works or remaining silent concerning their God’s view of those wicked works.
Sin causes a man's strength to fail. On the contrary, "the way of the LORD is strength to the upright." Man's choice to sin will eradicate his strength.
Man is not promised an endless supply of strength for him to store up. Rather, God promises to provide the necessary grace and strength for the present trials.
As Necho, king of Egypt, was on his way to fight against Carchemish, king Josiah of Judah came out against him for battle. Necho assured Josiah that the battle did not involve Judah and that the Lord had commanded him to make haste against the house of Carchemish. In order to turn Josiah’s intervention, Necho reminded Josiah that his intervention would be meddling with the will of God. Josiah refused to listen to the warning and meddled in these matters costing him his life (2 Chronicles 35:22-24). Gamaliel, a doctor of the law, expressed a similar statement when he told his peers that they should let the apostles alone lest they fight against God (Acts 5:34-39).