Trail of thoughts from Martyn Lloyd-Jones' book Let Not Your Heart Be Troubled.
"The greatest need of men and women in this world is the need of what is called a quiet heart."
"The claim of the gospel is not only that it can give us a quiet heart, but also that nothing else can do it."
"If we are depending for happiness and joy and a quiet heart, in a final sense, upon any individual human being, upon our family, our home, our profession, our money, our health and strength, we are doomed to experience disappointment."
"Do you want a quiet heart? Here is the way to have one - to believe that God has come to us in the person of his Son. We are not left on the human level; We are not left to grope vainly in the dark. God has done something, and this is what he has done: he has 'sent forth his Son, made of a woman, made under the law, to redeem them that were under the law' (Galatians 4: 4-5), that he might give us a quiet heart."