I agree that God presses us to give up everything to follow him but He knows full well the only one that was truly able to give up everything for God was Jesus. I think Jesus will take the areas that we are willing to give up, prune them, and then keep pressing us to give up more and as we do we will bear more fruit. I have yet to meet anyone who will admit that they have truly given up "everything" to follow Christ. And I think that everyone is still holding on to something. A lot of times in the Bible Jesus states the extreme to drive a point across. (does he really want us to pluck out our eye if it causes us to sin or is he pointing out how seriously we should take sin?) He is worth giving up everything for and his qualifications of heaven are sinless perfection. Sinless perfection can only be obtained one way, not by trying harder but by allowing Christ's death on the cross to be the payment for our sin and wipe the slate clean. This isn't a one time payment, this is a life long payment for our sin. Once we do that we will have the spirit of Christ living in us that will help us do better but since we still have the flesh we will continue to fail. We will fail by sining and we will fail by sometimes not listening or following Him. But Christ can not disown himself and he will continue to work on us to help us get back up. Notice when he said a lot of these things he hadn't yet died on the cross for our sins. A lot of the old testament does the same thing, points out the hopelessness of trying to 'obtain' salvation by some way other than accepting it as a free gift. To give up everything for Christ is what we should strive for, but try walking that walk for a year and see how far you get. I can't even get through a couple weeks before I run into something God tells me to do and I purposefully disobey. It's not right and I'm not condoning anyone to purposefully disobey God but that's who we are as humans. Some of us last a little longer than others but we all hit that brick wall at some point. Does God call us all to give up everything and follow Him? Yes. Do we have the ability to do it? No. All we can do is agree that we should and agree to try and when we run into those things that we just can't seem to get past or give up just ask for Him to help us with them and have mercy on us.