One day a week you should ‘keep holy’ (Ex. 20:8): that which is called the Lord’s day, because it is consecrated to the Lord, who on that day arose from the dead, disclosing and giving prior assurance of the general resurrection, when every earthly activity will come to an end. And you must not engage in any worldly activity that is not essential; and you must allow those who are under your authority and those who live with you to rest, so that together you may all glorify Him who redeemed us through His death and who arose from the dead and resurrected our human nature with Himself…
On this day you should go to the temple of God and attend the services held there and with sincere faith and a clean conscience you should receive the holy body and blood of Christ.
Saint Gregory Palamas