Of course, it's not that simple. Will God heal us in heaven?
We can't really know.
We know Jesus is in the business of healing. We know He defeats death. We know He forgives sin. So if your hand causes you to sin and you cut it off to keep from condemning your whole body to Hell, can't God restore that sinful part of you through forgiveness and redeem it?
Nothing will be broken in heaven...or will it?
One of the things we have to answer first before we can even really look at this question is...what, exactly, is the Kingdom?
For most of us, we have been taught that the Kingdom is the coming eternity with God. It's the after-life. It's what we do when we are beyond this curse-bound place and redeemed.
But ah, there it is - redeemed. If you are waiting for heaven to be redeemed, then, my friend, I have to ask you what you believe God is doing in your life now. Are you not already being redeemed?
Are you not already different in your heart than you were before you followed Jesus? Are you not already different in your approach to life than you were before you knew you were created in His image? Are you not already better, across so many facets of your life, than you were when you first met Him?
Friend, are you not already being redeemed?
And if you are being redeemed, then what exactly are you waiting on eternity for? The fullness of your redemption, yes, but only maybe?
In the beginning, God created the heavens and the earth. And He declared they were good. And the more He filled the earth, the more He declared that it was good. Until He got all the way down to human beings, to you and to me, and He declared it was "very good." There's no account in Genesis of the development of the heavens; only of the earth. And it was "very good."
And the New Testament is full of "one another"s. Of the way that we are supposed to live here, side by side and hand in hand and heart in heart. The grand vision that God has for us is the life we live together in His name.
And even Jesus Himself says the Kingdom has come. Indeed, it is already here.
So if it's better for you to be Kingdom-ward with one hand than to have two and miss it all entirely, be thrown into Hell in a separation of yourself from God....that doesn't necessarily mean we're talking about eternity. We could just as well be talking about the here and now - about a life separated from God versus one that is lived in the Kingdom...in loving and honoring and one anothering the way that God designed us to do so. If your hand is keeping you from living the life God has for you right now, cut it off. It's better to be without it.
But then...