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Point # 1 See to it that no one falls short of the grace of God: our call to holiness, Christian, is motivated by the prospect of seeing the Lord (14).

Point # 2 See to it that . . .

a) no bitter root grows up (15)
b) that no one is apostate or irreligious like Esau (16)

Point # 3 After apostasy, no second repentance is possible (17)