"Religion is fashionable in our age. But is it that which sprang up, after centuries of darkness, among our fathers in Europe? Is it that of apostles and prophets? Is it the calm yet thorough religion which did such great deeds in other days? Has it gone deep into the conscience? Has it filled the heart? Has it pervaded the man? Or has it left the conscience unpacified, the heart unfilled, the man unchanged, save with some external appliances of religiousness, which leaves him hollow as before? There is at this moment many an aching spirit, bitterly conscious of this hollowness. The doctrine, the profession, the good report of others, the bustle of work, will not fill the soul. God Himself must be there, with His covering righteousness, His cleansing blood, His quickening Spirit. Without this, religion is but a shell: holy services are dull and irksome. Joy in God, which is the soul and essence of worship, is unknown. Sacraments, prayer-meetings, religious services, labours of charity, will not make up for the living God."
Horatius Bonar. The Everlasting Righteousness (Kindle Locations 45-52). Monergism Books.