Are you not familiar with the warning Jesus gave us that originated from Isaiah 54 about falling to worship the wrong Christ, and not being found by Jesus as a symbolic "chaste virgin"? Did you even know that there is another Christ that comes first, and that he will be false, as per Lord Jesus' warning? In 2 Corinthians 11 Apostle Paul called that false one the "another Jesus". Have you not read that?
Therefore, if you are NOT 'watching' the SIGNS that Lord Jesus gave us (His Church) leading up to His future return, then how will you know about the false-Christ that comes first? How will know to recognize that false-Christ? do you think that false-Christ is going to tell you he is a fake? Haven't you read Apostle Paul's warning about that false-Christ that must come first, and how he will work signs and wonders, and exalt himself as GOD, and over all that is even called GOD, or that is worshiped? (2 Thess.2).
In Matthew 24:23-26 Lord Jesus is warning us about that same fake-Christ that comes first. The KJV translators made the Matt.24:24 verse about "false Christs" as plural when the context of the Matt.24:23 & 26 verse are actually singular, about a singular false-Christ that will work those signs and wonders that IF it were possible, would deceive even the very elect.
Then in Christ's Book of Revelation, Apostle John was giving this same type of warning of a coming false-Christ with Rev.13:11 forward about the "another beast" that work those signs and miracles to deceive the whole world with.
Luke 23:27-30
27 And there followed Him a great company of people, and of women, which also bewailed and lamented Him.
28 But Jesus turning unto them said, "Daughters of Jerusalem, weep not for Me, but weep for yourselves, and for your children.
29 For, behold, the days are coming, in the which they shall say, "Blessed are the barren, and the wombs that never bare, and the paps which never gave suck.
30 Then shall they begin to say to the mountains, 'Fall on us'; and to the hills, 'Cover us'."
KJV
Jesus said the above in red to those Jewish women that cried for Him on His way to be crucified. That "Blessed are the barren..." quote is from Isaiah 54. It is a metaphor about the status of betrothed virgin who stays barren waiting for her Husband vs. the married wife who does not remain "a chaste virgin" waiting on their True Husband to come, and is found "with child" (spiritually fallen to another, the fake-Christ who comes first.) So yeah, even Apostle Paul was using that "Blessed are the barren..." idea in 2 Corinthians 11 when he said he wanted to present us to Christ as "a chaste virgin", and that he 'espoused' us to One Husband (Jesus Christ).
So, you've never read Apostle Paul's warning about that "another Jesus", that comes first?
2 Cor 11:1-4
11 Would to God ye could bear with me a little in my folly: and indeed bear with me.
2 For I am jealous over you with godly jealousy: for I have espoused you to one Husband, that I may present you as a chaste virgin to Christ.
3 But I fear, lest by any means, as the serpent beguiled Eve through his subtilty, so your minds should be corrupted from the simplicity that is in Christ.
4 For if he that cometh preacheth another Jesus, whom we have not preached, or if ye receive another spirit, which ye have not received, or another gospel, which ye have not accepted, ye might well bear with him.
KJV