Matthew 10:16
Here is how it will be: I am sending you out like sheep among wolves; therefore you should be as crafty [Note: The Greek word here is "sensible"] as snakes, yet as harmless [Note: The Greek word is "sincere"] as doves.
Luke 14:30
saying, 'This man began to build [a tower] but was not able to finish it.'
John 9:4
While it is still daytime we must perform the acts of God, who sent me. Nighttime is coming, when no one can act.
1 Timothy 4:15-16
Be attentive to these things [i.e., all of the foregoing]; be involved in [practicing] them, so that your progress [in the ministry] will be evident to everyone.