Ecclesiastes 9:10

Colossians 3:23 NIV
Whatever you do, work at it with all your heart, as working for the Lord, not for human masters,

Ephesians 5:16 NIV
making the most of every opportunity, because the days are evil.

Matthew 6:33 NIV
But seek first his kingdom and his righteousness, and all these things will be given to you as well.

Romans 12:11 NIV
Never be lacking in zeal, but keep your spiritual fervor, serving the Lord.