to consider the spiritual Gifts of Healings, it may be wise to attempt to understand the whole subject.
This question is often asked and opinions about it differ. In attempting to find an answer it is necessary first to consider a matter of translation. The word for "atonement" in Romans 5:11 is in every other case translated "reconciliation", Romans 11:15, 2 Cor. 5:18-21, and that was the meaning of the word, at-one-ment, when the 1611 translation (A.V.) was made. Later on the word "atonement" took on instead the totally different meaning of expiation or reparation, which it still has, cf. English Dictionary. Now sin does need expiation and the Lord's death was to make reparation for the sin of the world and make the law honourable and establish it by the death of those who broke it, Romans 3:31, Isaiah 42:21. On the other hand sickness is not an offence against the Law of God, and does not therefore need any expiation, but is simply a human misfortune due to the loss of the Tree of Life in Eden, and it falls upon men without any regard to their character. Cf. Psalm 73:1-15, Job 2:1-8, 1 Timothy 5:23, James 5:15.
In the At-one-ment then, or reconciliation, is included not only healing but all the myriad blessings that come to men through our Lord's sacrifice for sin. "He that spared not His own Son but delivered Him up for us all, how shall He not with Him also freely give us all things?" (Romans 8:32). But the "atonement" in its later meaning of expiation for sin did not include men's sicknesses, for they were not sinful nor abhorrent to God's righteousness, and did not call for the death