NOTES for Luk 14:15-35
The Kingdom of God comes into this world, but a person must take a step toward it, for it is like a wedding feast to which everyone is invited, but not everyone wants to come. Very much depends on this step; that is why Christ speaks of it in such serious words. He may require everything from a person, even to the point of forgetting himself for the sake of the Kingdom. In order to take this step, the Good News must become more important than the things most important to a person: home, household, family, confidence in the future. (The Aramaic pair "love-hate" here simply means "prefer.")
But a serious step requires a serious decision, perhaps even more serious than the decision of the king or the tower builder in these parables. Christ wants trust, but He does not require madness: a person must soberly "calculate" whether the Gospel is truly more precious to him than all the rest of life, and if so, step toward it.