New Revised Standard Version
Therefore we must pay greater attention to what we have heard, so that we do not drift away from it.

Contemporary English Version
We must give our full attention to what we were told, so we won't drift away.

New American Bible
Therefore, we must attend all the more to what we have heard, so that we may not be carried away.

Douay-Rheims Bible
Therefore ought we more diligently to observe the things which we have heard lest perhaps we should let them slip.

Therefore ought we more diligently to observe the things which we have heard lest perhaps we should let them slip.

Therefore.

Hebrews 2:2-4 For if the word spoken by angels became steadfast and every transgression and disobedience received a just recompense of reward: . . .

Hebrews 1:1,2 God, who, at sundry times and in divers manners, spoke in times past to the fathers by the prophets, last of all, . . .

Hebrews 12:25,26 See that you refuse him not that speaketh. For if they escaped not who refused him that spoke upon earth, much more shall not we that turn away from him that speaketh to us from heaven. . . .

the more.

Deuteronomy 4:9,23 Keep thyself therefore, and thy soul carefully. Forget not the words that thy eyes have seen, and let them not go out of thy heart all the days of thy life. Thou shalt teach them to thy sons and to thy grandsons, . . .

Deuteronomy 32:46,47 And he said to them: Set your hearts on all the words, which I testify to you this day: which you shall command your children to observe and to do, and to fulfil all that is written in this law: . . .

Joshua 23:11,12 This only take care of with all diligence, that you love the Lord your God. . . .

1 Chronicles 22:13 For then thou shalt be able to prosper, if thou keep the commandments, and judgments, which the Lord commanded Moses to teach Israel: take courage and act manfully, fear not, nor be dismayed.

Psalm 119:9 By what doth a young man correct his way? by observing thy words.

Proverbs 2:1-6 That thy ear may hearken to wisdom: incline thy heart to know prudence. . . .

Proverbs 3:21 And there shall be life to thy soul, and grace to thy mouth.

Proverbs 4:1-4,20-22 I will give you a good gift, forsake not my law. . . .

Proverbs 7:1,2 Keep my commandments, and thou shalt live: and my law as the apple of thy eye: . . .

Luke 8:15 But that on the good ground are they who in a good and perfect heart, hearing the word, keep it and bring forth fruit in patience.

Luke 9:44 And all were astonished at the mighty power of God. But while all wondered at all the things he did, he said to his disciples: Lay you up in your hearts these words, for it shall come to pass that the Son of man shall be delivered into the hands of men.

we should.

Hebrews 12:5 And you have forgotten the consolation which speaketh to you, as unto children, saying: My son, neglect not the discipline of the Lord: neither be thou wearied whilst thou art rebuked by him.

Matthew 16:9 Do you not yet understand, neither do you remember the five loaves among five thousand men, and how many baskets you took up?

Mark 8:18 Having eyes, see you not? And having ears, hear you not? Neither do you remember?

2 Peter 1:12,13,15 For which cause, I will begin to put you always in remembrance of these things: though indeed you know them and are confirmed in the present truth. . . .

2 Peter 3:1 Behold this second epistle I write to you, my dearly beloved, in which, I stir up by way of admonition your sincere mind:

let them slip.

Habakkuk 1:6 For behold, I will raise up the Chaldeans, a bitter and swift nation, marching upon the breadth of the earth, to possess the dwelling places that are not their own.

Habakkuk 2:16 Thou art filled with shame instead of glory: drink thou also, and fall fast asleep: the cup of the right hand of the Lord shall compass thee, and shameful vomiting shall be on thy glory.