Charles H. Spurgeon on Psalms 26:2

Prove me. The work of conscience within us doth prove us. God hath set up a light within us, and when this is enlightened by the Word, then it makes a man's breast full of light. Now a faithful godly man loveth that this should be tender, active, speaking out of God's Word for every duty, and against every sin. You see the quickness of it in David, when it is said, "His heart smote him; "and 1 John 3., "If thy heart condemn thee, God is greater than thy heart." Alas! if thou within thine own self judgest thyself to sin thus and thus, God doth much more. Try thy integrity; art thou willing to have a tender conscience, and an informed conscience? Dost thou love to hear what that speaks out of God's Word? whether peace or duty? this is comfortable. But on the other side, if thou art a man that rebellest against the light of it, wouldst fain put out the sting of it, wouldst be glad to feel no such living thing in thy breast, then thou hast cause to suspect thyself. Oh, it is to be feared that there are many that give themselves to lusts, and carnal pleasures, that so they may put a foggy mist between their conscience and themselves. Others dig into the world, labouring to become senseless, that so there may be an eclipse of this light by the interposition of the earth. Others run to damnable heresies, denying Scriptures, God, heaven, hell; pleading for an universal salvation of all. What are these but refuges of guilty consciences? We must distinguish between our carnal concupiscence, and conscience; between deluded imaginations, and conscience; between an erroneous and scrupulous conscience, and a well grounded and truly informed conscience; and when we have done so, we must follow conscience as far as that follows the Word. Anthony Burgess.