In Nashville we had a total eclipse of the sun in the year 2017, and although it took a while to reach its totality, or the period of time in which the moon totally covers the sun, the totality itself lasted for two minutes or less. Quite often the period of time in which God shines His light of opportunity on us is short as well. If we miss the chance to see or to act upon the calling God presents us, we may never experience that particular opportunity again.