11 Concerning him we have much to say, and it is hard to explain, since you have become dull of hearing. 12 For though by this time you ought to be teachers, you have need again for someone to teach you the elementary principles of the oracles of God, and you have come to need milk and not solid food. 13 For everyone who partakes only of milk is not accustomed to the word of righteousness, for he is an infant. 14 But solid food is for the mature, who because of practice have their senses trained to discern good and evil. Heb. 5:11–14, NASB
Apostasy: [Middle English apostasie, from Old French, from Late Latin apostasia, defection, from Late Greek apostasi, from Greek apostasis, revolt, from aphistanai, aposta-, to revolt : apo-, apo- + histanai, to stand, place; see st- in Indo-European roots.] Noun pl -sies abandonment of one’s religious faith, political party, or cause [Greek apostasis desertion]
Collins Essential English Dictionary 2nd Edition 2006 © HarperCollins Publishers 2004, 2006
Another good way to understand apostasy and what causes one to abandon his or her religious faith is “to forget.” In the history of civilization, the battle between intellectual honesty and intellectual barbarity is one that has cycled back and forth for millennia. When intellectual honesty is on top, truth is seen as succinct and knowable and authoritative. When intellectual barbarity is on top, truth is seen as relative and completely unknowable. In case you weren’t sure, we are now in an intellectual barbarian stage in the early 21st Century.