4. Those who make great efforts can enter the kingdom of heaven.
Matthew 7:13-14
Enter you in at the strait gate: for wide is the gate, and broad is the way, that leads to destruction, and many there be which go in thereat: Because strait is the gate, and narrow is the way, which leads to life, and few there be that find it.
Matthew 11:12
And from the days of John the Baptist until now the kingdom of heaven suffers violence, and the violent take it by force
Matthew 16:25
For whoever will save his life shall lose it: and whoever will lose his life for my sake shall find it.
