Luke 13:24
"You must strain every nerve to get in through the narrow door, for I tell you many will try to get in, and will not succeed,
Hebrews 4:11
Let us, therefore, make every effort to be admitted to that Rest, so that none of us may fail through such disobedience as theirs.
Hebrews 6:11-12
But we want each of you to exhibit this same earnestness to the very end with regard to your confidence in your hope,
2 Peter 1:5
For this very reason make every effort to supplement your faith with goodness, goodness with knowledge,
2 Peter 1:10
Therefore, brothers, make all the greater efforts to make God's call and choice of you certain. For if you have these qualities, you will never stumble,