John Wesley 
The Witness of Our Own Spirit [EPUB ebook] 

“This is our rejoicing, the testimony of our conscience, that in simplicity and godly sincerity, not with fleshly wisdom, but by the grace of God, we have had our conversation in the world.” - 2 Cor. 1:12

Such is the voice of every true believer in Christ, so long as he abides in faith and love. “He that followeth me, ” saith our Lord, “walketh not in darkness:” And while he hath the light, he rejoiceth therein. As he hath “received the Lord Jesus Christ, ” so he walketh in him; and while he walketh in him, the exhortation of the Apostle takes place in his soul, day by day, “Rejoice in the Lord always; and again I say, Rejoice.”