With God and Christ, you must be fully commited, as in all in or it's nothing.
He gives examples in the earthly sphere of that
And it came to pass, as he went into the house of one of the chief Pharisees to eat bread on the sabbath day, that they watched him. And, behold, there was a certain man before him which had the dropsy. And Jesus answering spake unto the lawyers and Pharisees, saying, Is it lawful to heal on the...
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27 And whosoever doth not bear his cross, and come after me, cannot be my disciple.
28 For which of you, intending to build a tower, sitteth not down first, and counteth the cost, whether he have sufficient to finish it?
29 Lest haply, after he hath laid the foundation, and is not able to finish it, all that behold it begin to mock him,
30 Saying, This man began to build, and was not able to finish.
31 Or what king, going to make war against another king, sitteth not down first, and consulteth whether he be able with ten thousand to meet him that cometh against him with twenty thousand?
32 Or else, while the other is yet a great way off, he sendeth an ambassage, and desireth conditions of peace.
33 So likewise, whosoever he be of you that forsaketh not all that he hath, he cannot be my disciple.