Jesus challenges us to keep at it. The key to victory is to depend on God and keep at it.

Don’t give up. Don’t quit.

God is God. Jesus will sustain us. Our job is to not give up. God’s job is to sustain us. God is faithful. God will do his part. Will I do mine?

At that time, this song
    will be sung in the country of Judah:
We have a strong city, Salvation City,
    built and fortified with salvation.
Throw wide the gates
    so good and true people can enter.
People with their minds set on you,
    you keep completely whole,
Steady on their feet,
    because they keep at it and don’t quit.
Depend on God and keep at it
    because in the Lord God you have a sure thing.
Those who lived high and mighty
    he knocked off their high horse.
He used the city built on the hill
    as fill for the marshes.
All the exploited and outcast peoples
    build their lives on the reclaimed land.

Source: Isaiah 26:3 MSG – Stretch the Borders of Life – At that – Bible Gateway