In the Old Testament, God gave practices to help his people remember what he had done

24 You shall observe this rite as a statute for you and for your sons forever. 25 And when you come to the land that the Lord will give you, as he has promised, you shall keep this service. 26 And when your children say to you, ‘What do you mean by this service?’ 27 you shall say, ‘It is the sacrifice of the Lord’s Passover, for he passed over the houses of the people of Israel in Egypt, when he struck the Egyptians but spared our houses.’” And the people bowed their heads and worshiped. —Exodus 12:24-27

2 And you shall remember the whole way that the Lord your God has led you these forty years in the wilderness, that he might humble you, testing you to know what was in your heart, whether you would keep his commandments or not…11 “Take care lest you forget the Lord your God by not keeping his commandments and his rules and his statutes, which I command you today, 12 lest, when you have eaten and are full and have built good houses and live in them, 13 and when your herds and flocks multiply and your silver and gold is multiplied and all that you have is multiplied, 14 then your heart be lifted up, and you forget the Lord your God, who brought you out of the land of Egypt, out of the house of slavery, 15 who led you through the great and terrifying wilderness, with its fiery serpents and scorpions and thirsty ground where there was no water, who brought you water out of the flinty rock, 16 who fed you in the wilderness with manna that your fathers did not know, that he might humble you and test you, to do you good in the end. 17 Beware lest you say in your heart, ‘My power and the might of my hand have gotten me this wealth.’ 18 You shall remember the Lord your God, for it is he who gives you power to get wealth, that he may confirm his covenant that he swore to your fathers, as it is this day. —Deuteronomy 8:2, 11-18

Remembering with a right heart

17 But in the following instructions I do not commend you, because when you come together it is not for the better but for the worse. 18 For, in the first place, when you come together as a church, I hear that there are divisions among you. And I believe it in part,[a] 19 for there must be factions among you in order that those who are genuine among you may be recognized. 20 When you come together, it is not the Lord’s supper that you eat. 21 For in eating, each one goes ahead with his own meal. One goes hungry, another gets drunk. 22 What! Do you not have houses to eat and drink in? Or do you despise the church of God and humiliate those who have nothing? What shall I say to you? Shall I commend you in this? No, I will not. —1 Corinthians 11:17-22

27 Whoever, therefore, eats the bread or drinks the cup of the Lord in an unworthy manner will be guilty concerning the body and blood of the Lord. 28 Let a person examine himself, then, and so eat of the bread and drink of the cup. 29 For anyone who eats and drinks without discerning the body eats and drinks judgment on himself. 30 That is why many of you are weak and ill, and some have died.[a] 31 But if we judged[b] ourselves truly, we would not be judged. 32 But when we are judged by the Lord, we are disciplined[c] so that we may not be condemned along with the world.

33 So then, my brothers,[d] when you come together to eat, wait for[e] one another— 34 if anyone is hungry, let him eat at home—so that when you come together it will not be for judgment. About the other things I will give directions when I come. —1 Corinthians 11:27-34

Self-Examination

23 Search me, O God, and know my heart!
Try me and know my thoughts![a]
24 And see if there be any grievous way in me,
and lead me in the way everlasting![b] —Psalms 139:23-24

Remember the significance of Christ’s work

23 For I received from the Lord what I also delivered to you, that the Lord Jesus on the night when he was betrayed took bread, 24 and when he had given thanks, he broke it, and said, “This is my body, which is for[a] you. Do this in remembrance of me.”[b] 25 In the same way also he took the cup, after supper, saying, “This cup is the new covenant in my blood. Do this, as often as you drink it, in remembrance of me.” 26 For as often as you eat this bread and drink the cup, you proclaim the Lord’s death until he comes. —1 Corinthians 11:23-26

3 For I delivered to you as of first importance what I also received: that Christ died for our sins in accordance with the Scriptures, 4 that he was buried, that he was raised on the third day in accordance with the Scriptures, 5 and that he appeared to Cephas, then to the twelve. —1 Corinthians 15:3-5

21 For our sake he made him to be sin who knew no sin, so that in him we might become the righteousness of God. —2 Corinthians 5:21

17 Therefore, if anyone is in Christ, he is a new creation.[a] The old has passed away; behold, the new has come. —2 Corinthians 5:17

Taking Communion

16 The cup of blessing that we bless, is it not a participation in the blood of Christ? The bread that we break, is it not a participation in the body of Christ? 17 Because there is one bread, we who are many are one body, for we all partake of the one bread. —1 Corinthians 10:16-17