From Of First Importance:

“Suppose a man should come to his dinner table, and there should be a knife laid down, and it should be told him, ‘This is the very knife that cut the throat of your child!’ If the man would use this knife as a common knife, would not everyone say, ‘Surely this man had but very little love to his child, who can use this bloody knife as a common knife!’

Look upon the cross on which Christ was crucified, and the pains He suffered thereon—and the seeming sweetness which is in sin, will quickly vanish. When you are solicited to sin, cast your eye upon Christ’s cross; remember His astonishing sufferings for your sin, and sin will soon grow distasteful to your soul. How can sin not be hateful to us—if we seriously consider how hurtful it was to Jesus Christ?”

—Thomas Brooks, “The Golden Key to Open Hidden Treasures”