SPECULATION
There has always been speculation and vain discussions concerning spiritual things. This is different than inquiry and digging out difficult answers. There is no harm in wanting to know more and seeking for truth. Speculation is when it becomes a “different doctrine.”
Paul, an apostle, wrote to his spiritual son Timothy concerning these very issues, “As I urged you when I went into Macedonia, stay there in Ephesus so that you may command certain people not to teach false doctrines any longer or to devote themselves to myths and endless genealogies. Such things promote controversial speculations rather than advancing God’s work—which is by faith. The goal of this command is love, which comes from a pure heart and a good conscience and a sincere faith. Some have departed from these and have turned to meaningless talk. They want to be teachers of the law, but they do not know what they are talking about or what they so confidently affirm. We know that the law is good if one uses it properly. We also know that the law is made not for the righteous but for lawbreakers and rebels, the ungodly and sinful, the unholy and irreligious, for those who kill their fathers or mothers, for murderers, for the sexually immoral, for those practicing homosexuality, for slave traders and liars and perjurers—and for whatever else is contrary to the sound doctrine that conforms to the gospel concerning the glory of the blessed God, which he entrusted to me.” (Book of 1 Timothy 1:3-11)
“Do not think that I have come to abolish the Law or the Prophets; I have not come to abolish them but to fulfill them.” Jesus