add: Heidelberg Catechism

references/hc/LD30-HC81.md

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+### 81. Q. Who should come to the Lord’s table?
+
+**A**. Those who are displeased with themselves because of their sins, but who nevertheless trust that their sins are pardoned and that their remaining weakness is covered by the suffering and death of Christ, and who also desire more and more to strengthen their faith and to lead a better life. Hypocrites and those who are unrepentant, however, eat and drink judgment on themselves.<sup>1</sup>
+
+<sup>1</sup> [1 Cor. 10:19-22](/index.php/get-passage/1+Corinthians+10:19-22); [11:26-32](/index.php/get-passage/1+Corinthians+11:26-32)