Even the thoughts must be brought into subjection to the will of God, and the feelings under the control of reason and religion. Our imagination was not given us to be allowed to run riot and have its own way, without any effort at restraint and discipline. If the thoughts are wrong, the feelings will be wrong; and the thoughts and feelings combined make up the moral character.
The power of right thought is more precious than the golden wedge of Ophir.... We need to place a high value upon the right control of our thoughts, for such control prepares the mind and soul to labor harmoniously for the Master. It is necessary for our peace and happiness in this life that our thoughts center in Christ. As a man thinketh, so is he. Our improvement in moral purity depends on right thinking and right acting.... Evil thoughts destroy the soul. The converting power of God changes the heart, refining and purifying the thoughts. Unless a determined effort is made to keep the thoughts centered on Christ, grace cannot reveal itself in the life. The mind must engage in the spiritual warfare. Every thought must be brought into captivity to the obedience of Christ. All the habits must be brought under God’s control.
We need a constant sense of the ennobling power of pure thoughts and the damaging influence of evil thoughts. Let us place our thoughts upon holy things. Let them be pure and true, for the only security for any soul is right thinking. We are to use every means that God has placed within our reach for the government and cultivation of our thoughts. We are to bring our minds into harmony with His mind. His truth will sanctify us, body and soul and spirit, and we shall be enabled to rise above temptation.
The control of the thoughts, in cooperation with the Holy Spirit, will give control of the words. This is true wisdom, and will ensure quietness of mind, contentment, and peace. There will be joy in the contemplation of the riches of the grace of God. HP 164
“Holy and reverend is His name,” the psalmist declares. Angels, when they speak that name, veil their faces. With what reverence, then, should we, who are fallen and sinful, take it upon our lips! Pr 210
"Casting down imaginations, and every high thing that exalteth itself against the knowledge of God, and bringing into captivity every thought to the obedience of Christ;" 2 Corinthians 10:5 (King James Version)