In short, the reason you want to to be watchful and prayerful and keep the word of His patience (Matt. 24.40-42, Luke 21.36, Rev. 3.10) is because if you don't you will not be received, taken or raptured at the first rapture "before the throne" (Rev. 7.9) before the first trumpet (8.7ff) of the Tribulation begins. Thus, you will pass through the Tribulation and be raptured at the last trumpet instead. And if you remain with that same attitude of not being ready, you will also not return with Christ (Jude 14,15) to reign over the nations (Rev. 2.26, 20.4-6) for the 1000 years. Thus, shall you be disciplined for 1000 years in "outer darkness" (having no fire or furnace about it) outside the light of rewards of reigning with Christ for the 1000 years. That's a long time as one of the 5 unwise virgins to lose rewards, not permitted to enter the marriage feast of the millennial first resurrection kingdom reign.
And the reason we know the Tribulation is Sept. 14, 2015 to Aug. 7, 2022 is because this is exactly 2,520 days required for 7 years x 360 days per year of Daniel's prophecy that is applied to the last 3 feasts pertaining to when Jesus returns with the first rapture on Feast of Trumpets and Jesus stepping down on the mount of olives on Tisha B'Av (1260th day) to reign in the Temple by the 1335th day (75 days after He steps down). The 1335th day is after the 3 feasts and on the 4th day of Simchat Torah (Oct. 18-21, 2022), the final celebration as a 4 day inspection. Simchat Torah is when Israel brings out the Torah Scroll to read as well to show forth the 3 items of the Ark of the Covenant: rod that budded, ten commandments and manna from heaven.
The Holy of Holies represents our spirit, the Holy Place our soul and the outer court our body. The Holy Spirit comes down and rests in our new spirit possesing eternal life. Our spirit has three functions exhibited in the Holy of Holies. We know the law of the Ten Commandments by our conscience that convicts us. We commune in our spirit with God as Hi Holy Spirit comes down across the cheribum to the mercy seat. Intuitively we know by what the Holy Spirit conveys to us His will by the law. And the 3 items in Ark represent the work of the Trinity: the rod that budded (Spirit's movement), manna from heaven to be eaten (word of God), and the Ten Commandments (given by the Father). The Ark of Testimony of God is not located in our soul or body but our spirit.