Fight All Your Battles On Your Knees.
if My people who are called by My name will humble themselves, and pray and seek My face, and turn from their wicked ways, then I will hear from heaven, and will forgive their sin and heal their land. 2 Chronicles 7:14 NKJV
He promised to answer the prayers of his people that should at any time be made in that place. National judgments are here supposed, famine, and pestilence, and perhaps war, for by the locusts devouring the land meant enemies as greedy as locusts, and laying all waste.
National repentance, prayer, and reformation, are required. God expects that his people who are called by his name, if they have dishonoured his name by their iniquity, should honour it by accepting the punishment of their iniquity. They must be humble themselves under his hand, must pray for the removal of the judgment, must seek the face and favour of God; and yet all this will not do unless they turn from their wicked ways, and return to the God from whom they have revolted.
National mercy is then promised, that God will forgive their sin, which brought the judgment upon them, and then heal their land, redress all their grievances. Pardoning mercy makes ways for healing mercy, Psalm 103:3; Matthew 9:2. - Matthew Henry