'Make hay while the sun shines"
John 9:4 I must work the works of him that sent me, while it is day: the night cometh, when no man can work. 5 As long as I am in the world, I am the light of the world.
John 11:9 Jesus answered, Are there not twelve hours in the day? If any man walk in the day, he stumbleth not, because he seeth the light of this world.