Treasury of Scripture Knowledge
Let us labour therefore to enter into that rest, lest any man fall after the same example of unbelief.
Therefore let us be on our guard lest perhaps, while He still leaves us a promise of being admitted to His rest, some one of you should be found to have fallen short of it.
But we long for each of you to continue to manifest the same earnestness, with a view to your enjoying fulness of hope to the very End;
"Enter by the narrow gate; for wide is the gate and broad the road which leads to ruin, and many there are who enter by it;
But from the time of John the Baptist till now, the Kingdom of the Heavens has been suffering violent assault, and the violent have been seizing it by force.
"Strain every nerve to force your way in through the narrow gate," He answered; "for multitudes, I tell you, will endeavour to find a way in and will not succeed.
The Law and the Prophets continued until John came: from that time the Good News of the Kingdom of God has been spreading, and all classes have been forcing their way into it.
Bestow your pains not on the food which perishes, but on the food that remains unto the Life of the Ages--that food which will be the Son of Man's gift to you; for on Him the Father, God, has set His seal."
Therefore, my dearly-loved friends, as I have always found you obedient, labour earnestly with fear and trembling--not merely as though I were present with you, but much more now since I am absent from you--labour earnestly, I say, to make sure of your own salvation.
2 Peter 1:10
For this reason, brethren, be all the more in earnest to make sure that God has called you and chosen you; for it is certain that so long as you practise these things, you will never stumble.
see to it, brethren, that there is never in any one of you--as perhaps there may be--a sinful and unbelieving heart, manifesting itself in revolt from the ever-living God.