Now large crowds were traveling with him; and he turned and said to them, “Whoever comes to me and does not hate father and mother, wife and children, brothers and sisters, yes, and even life itself, cannot be my disciple. Whoever does not carry the cross and follow me cannot be my disciple. For which of you, intending to build a tower, does not first sit down and estimate the cost, to see whether he has enough to complete it? Otherwise, when he has laid a foundation and is not able to finish, all who see it will begin to ridicule him, saying, ‘This fellow began to build and was not able to finish.’ Or what king, going out to wage war against another king, will not sit down first and consider whether he is able with ten thousand to oppose the one who comes against him with twenty thousand? If he cannot, then, while the other is still far away, he sends a delegation and asks for the terms of peace. So therefore, none of you can become my disciple if you do not give up all your possessions. (Luke 14:25-33, NRSV)
What does it cost to be a disciple?
Well nothing and everything.
Nothing because Jesus paid the price to give us all free grace. We are accepted as we are and can pay nothing to gain the richest life we could possibly imagine.
Yet it costs us everything, as Christ commands us to take up our cross and follow after Him. And to sell all of our possessions, and give away everything we have.
You see we can not purchase it, but once we have it, we realize that everything we did have was not ours in the first place.
So give everything up to Him who made it possible for you to have it and follow Him where He leads you!