"The field of conflict is the domain of the heart. The battle which we have to fight--the greatest battle that was ever fought by man--is the surrender of self to the will of God, the yielding of the heart to the sovereignty of love."
Thoughts From the Mount of Blessing E.G.W. p. 141
....bringing every thought into captivity to the obedience of Christ,
2 Corinthians 10:5