It's about remembering. Remembering Christ's sacrifice. Remembering past that to the children of Israel being brought out of the land of Egypt, symbolic of bondage and servitude. Brought in to the Promised Land of blessings from God.
Communion helps us remember what He's done in our lives, too. He's transferred us from the kingdom of darkness to the kingdom of light.
Communion is also a time of rejoicing. A time to announce to the world that there's forgiveness available to all in Jesus.
Communion is a time of repenting. Forgving those who have transgressed against us. Also those we've transgessed against. A good prayer to pray at this point is, "Lord, show me if there's anyone I've offended in word or deed." When He know what you have to do...make it right.
Communion is a time of celebrating the reconciliation we have in Christ and the ministry of reconciliation He's given us to pass on to others.
(Thanks to my pastor for his message today summarized above.)

1 O God, you are my God;
       I earnestly search for you. My soul thirsts for you;
       my whole body longs for you in this parched and weary land
       where there is no water.

    2 I have seen you in your sanctuary
       and gazed upon your power and glory.

    3 Your unfailing love is better to me than life itself;
       how I praise you!

    4 I will honor you as long as I live,
       lifting up my hands to you in prayer.

    5 You satisfy me more than the richest of foods.
       I will praise you with songs of joy.

    6 I lie awake thinking of you,
       meditating on you through the night.

    7 I think how much you have helped me;
       I sing for joy in the shadow of your protecting wings.

    8 I follow close behind you;
       your strong right hand holds me securely.

Psalm 63:1-8 (NLT)

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