Walter Scott's Commentary on Revelation
Revelation 1:10. — "I became in (the) Spirit on the Lord's day ." All Christians are "in Christ," in contrast with their former state "in Adam," and are "in the Spirit" in contrast with their previous condition "in the flesh." No Christian can ever be found again in either "Adam" or "flesh," both describing a past condition. In the former is signified that you are of that race of which "Adam" is head; in the latter is intimated the morally fallen condition in which the race is found. But being in the Spirit (Romans 8:1-39), as every Christian undoubtedly is, does not convey the force of "I became in (the) Spirit." The meaning is, that John was held, controlled, and characterised by an absolute subservience to the Spirit. Taken out from the consciousness of everyday life and circumstances, he found himself in another state of being. From the absence of the article before "Spirit," it must not be inferred that the Holy Spirit is not meant. It is not the Holy Spirit as a Person, nor our own spirit that is referred to, but the omission of the article marks the phrase as indicating a characteristic state, a state characterised by the Holy Ghost, and one in which the human spirit and the whole inner being were for the time absorbed (compare Ezekiel 11:24 with 2 Corinthians 12:2-3). Paul in his ecstatic state was not allowed then, nor afterwards, to record what he saw and heard. John, on the contrary, was commanded to do both.