Again, A GOOD CONSCIENCE is another spring of assurance: 2 Cor 1:12, "For our rejoicing is this—Our conscience testifies that we have conducted ourselves in the world, and especially in our relations with you, in the holiness and sincerity that are from God. We have done so not according to worldly wisdom but according to God's grace." So 1 John 3:21, "Beloved, if our heart condemns us not, then have we confidence towards God." A good conscience has sure confidence; he who has it sits, Noah-like, in the midst of all disruptions and turmoils, in sincerity and serenity, uprightness and boldness. A good conscience and a good confidence go together.
Heaven on earth, Chapter 1