Near the height of his popularity Jesus told this story about builders who began to build a tower, but ran out of resources before completing it. Before we begin something we should crunch the numbers and consider the cost.
Luke 14:25-33 New International Version (NIV)
The Cost of Being a Disciple
25 Large crowds were traveling with Jesus, and turning to them he said: 26 “If anyone comes to me and does not hate father and mother, wife and children, brothers and sisters—yes, even their own life—such a person cannot be my disciple. 27 And whoever does not carry their cross and follow me cannot be my disciple.
28 “Suppose one of you wants to build a tower. Won’t you first sit down and estimate the cost to see if you have enough money to complete it? 29 For if you lay the foundation and are not able to finish it, everyone who sees it will ridicule you, 30 saying, ‘This person began to build and wasn’t able to finish.’
31 “Or suppose a king is about to go to war against another king. Won’t he first sit down and consider whether he is able with ten thousand men to oppose the one coming against him with twenty thousand? 32 If he is not able, he will send a delegation while the other is still a long way off and will ask for terms of peace. 33 In the same way, those of you who do not give up everything you have cannot be my disciples.