Hebrews 6:4

4For it is impossible for those who were once illuminated, and have even tasted of the heavenly gift, and have become sharers in the Holy Spirit,
6:4 It is impossible, etc: The meaning is, that it is impossible for such as have fallen after baptism, to be again baptized; and very hard for such as have apostatized from the faith, after having received many graces, to return again to the happy state from which they fell.(Challoner)
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