1 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.Now some wise words from Hebrews 3:
2 For if the word spoken by angels was stedfast, and every transgression and disobedience received a just recompence of reward;
3 How shall we escape, if we neglect so great salvation; which at the first began to be spoken by the Lord, and was confirmed unto us by them that heard him; . . .
6 But Christ as a son over his own house; whose house are we, if we hold fast the confidence and the rejoicing of the hope firm unto the end. . . .Finally, from Hebrews 4:
12 Take heed, brethren, lest there be in any of you an evil heart of unbelief, in departing from the living God.
13 But exhort one another daily, while it is called Today; lest any of you be hardened through the deceitfulness of sin.
14 For we are made partakers of Christ, if we hold the beginning of our confidence stedfast unto the end;
1 LET us therefore fear, lest, a promise being left us of entering into his rest, any of you should seem to come short of it. . . .
11 Let us labour therefore to enter into that rest, lest any man fall after the same example of unbelief.
Who can doubt that Paul understood there was a need for human effort, and that fellow Christians who had tasted the grace of Christ could slip and fall short of the blessings God offers?
Hebrews has more to say on this topic. And then, of course, we have the powerful words of Peter, and many other witnesses.