Does God Promise Health?

Many preachers say that it's God's will for christians to be disease-free their entire life; and healing is just a matter of faith and time. But is physical health a promise of God? Does God always want you healed? Faith healers like Benny Hinn will "heal" internal diseases; but want about growing back a limb.  What about the wounded soldier that has lost an eye in battle? What about gluttony induced diabetes and heart disease? Does God want to heal, or does God want repentence?  For those who have degenerative diseases, is "healing" the only spiritual message the church has for them?  What about in the meantime? For christians with MS, Sickle Cell, Lupus, or are wheelchair-bound, is their disease the result of sin or a lack of faith?  God can heal...but what is his message to those affected when he chooses NOT to? What if God is not trying to "Heal You From"; but rather "Take You Through"?