William Burkitt on Matthew 5:8

Note here, 1. The duty required and called for, Purity of heart and life: the first expressed, the other included: for a clean heart will be accompanied with a clean life. Where there is a principle of grace within, there will be the acting of grace without.

Note, 2. The incentive to this duty; the pure in heart, and holy in life shall see and enjoy God; the infinitely pure and perfectly holy God. They shall see him and spiritually mediately in this life, gloriously and immediately in the life to come.