Luke 14:28-30, 33

For which of you, desiring to build a tower, doth not first sit down and count the cost, whether he have wherewith to complete it? Lest haply, when he hath laid a foundation, and is not able to finish, all that behold begin to mock him, saying, This man began to build, and was not able to finish.

So therefore whosoever he be of you that renounceth not all that he hath, he cannot be my disciple.