The Lord Jesus calls those blessed who are pure in heart (Matthew 5.8). He means those who do not aim merely at outward correctness but at inward holiness. They are not satisfied with a mere external show of religion. They strive to keep a heart and a conscience void of offense, and to serve God with the spirit and the inner man. Blessed are all such. The heart is the man (1 Samuel 16.7). He who is most spiritually-minded will have most communion with God. – J. C. Ryle (1816-1900), from a meditation on Matthew 5.1-12.