What does the Bible say about striving to enter heaven?

In Luke 13:22-30, Jesus emphasizes the urgency of striving to enter the narrow gate, indicating that many will seek to enter but will not be able. This call to strive highlights the importance of sincere personal faith and repentance, rather than relying on mere religious observance. The passage serves as a reminder that true salvation is not guaranteed by heritage or ritual, but by a genuine relationship with Christ. The challenge is personal, urging each individual to examine their own spiritual condition and pursuit of righteousness.