Luke 13:24
Agonize to enter in through the narrow gate: because many, I say unto you, will seek to enter in, and will not be able.
Hebrews 4:11
Therefore let us hasten to enter into that rest, lest some one may fall by the same example of unbelief.
Hebrews 6:11-12
But we desire each one of you to exhibit the same diligence unto the full assurance of hope unto the end:
2 Peter 1:5
And in harmony with this same thing also, add to your faith heroism; and to heroism, knowledge;
2 Peter 1:10
Therefore, brethren, be the more diligent to make your calling and election sure: for doing these things you can never fall.