When the time comes, and especially the time put aside for God and His temple, a Feast Day or the hour of Divine Services, hurry to tear your self away from business and worldly cares and voluntarily and zealously offer yourself to God in His church. When you enter the church bring to mind the promise of the Lord to those that gather in His name: there am I in the midst of them (Matt. 18:20), and stand reverently in church, as before the very face of Christ, and pray to Him that he sanctify you by His holiness, animate you by His prayer, and enlighten you with the word of the Gospel and the Grace of the Mysteries.
Take note of this, too: in the church, Angels serve with us and guard the holiness dwelling there. Once, in the Lavra of Saint Theodosius near Jerusalem, Abba Leontius, coming one Sunday to church to receive the Holy Mysteries, saw an Angel standing on the right side of the Holy Table, and when the elder, being afraid, turned to run to his cell, the voice of the Angel called to him: “From the time this Holy Table was consecrated, I have been charged to stay by it.”
Remember this, beloved, and stand reverently. And, if you feel that only your body is standing in church, while your mind thinks of home, or the market, or a place of merriment, collect yourself. Hurry to bring back your mind that has strayed, join it to God in your heart, force it to strive towards God, Who looks upon you. When you hear the Word of God, open up not only your bodily ears, but your spiritual ones as well, open your heart, receive this heavenly Bread and with it nourish not only your memory, but also your life and work.
~Saint Philaret, Metropolitan of Moscow
More on Church Attendance
Don’t be tempted to indulge yourself in not coming to church at the beginning of the service or leaving before it is over. Remember, each service is a complete unit and it can provide its full benefit only in its entirety. Just as food is tasty only when it is fully seasoned, so the service can completely satisfy the spiritual taste only when it is heard in full. Thus, he who misses the beginning or does not remain until the end is laboring, but he deprives himself of the fruit of his labor; he creates with one hand and destroys with the others. Further, one must go to church not inattentively. For, it is always possible that one may go to church not in a way worthy of praise but rather of condemnation, i.e., by going and not receiving any spiritual benefit.
Approaching the church, you must leave every care and worry about your affairs at the threshold in order to enter with a serene mind. Entering the church, you must put on reverence like a garment, remembering to Whom we are coming and to Whom we intend to address our prayers. Having taken your place in the church (best of all, the same place each time), you should gather your thoughts and mentally stand before the face of the omnipresent God, offering Him reverent worship in body and spirit, with a contrite heart and in humble reverence. After this, you must follow, without wandering thoughts, everything that is going on — what is being sung and read in the church — all the way to the end of the service. That is all! In this way, we won’t be bored in church, looking here and there and starting conversations, and we won’t be wishing that the service be over soon. Instead, passing from one prayerful feeling to another and from one reverent thought to the next, we will be like those in a fragrant garden, moving from one group of flowers to another.
~ Saint Theophan the Recluse