Warning to Pay Attention

1 We must pay the most careful attention, therefore, to what we have heard, so that we do not drift away.

Read Hebrews 2:1 Using Other Translations

Therefore we ought to give the more earnest heed to the things which we have heard, lest at any time we should let them slip.
Therefore we must pay much closer attention to what we have heard, lest we drift away from it.
So we must listen very carefully to the truth we have heard, or we may drift away from it.