This chapter documents a discussion between Jesus and his disciples. Upon leaving the temple, Jesus comments of its destruction (vs 2). Subsequently, they wanted to know about three things from Jesus: 1) the timing of the temple’s destruction, 2) the sign of His coming, and 3) the end of the age (vs 3).
Jesus begins His answer, “See that no one leads you astray. For many will come in my name, saying, I am the Christ, and they will lead many astray.” (vs 4-5) He continues foretelling terrible natural events (e.g. wars, famine, etc.) but also a spiritual “tribulation” (persecution) where many saints will “fall away” (vs 10). Despite this, He warns again that “the one who endures to the end will be saved” (vs 13) and the “gospel of the kingdom will be proclaimed throughout the whole world” after which “the end will come”. (vs 14)
The preceding seems to be an overview before beginning to speak about a specific “great tribulation” (vs 21) that they would experience. He refers to this as “the abomination of desolation spoken of by the prophet Daniel” (vs 15) and prays that their “flight may not be in winter or on a Sabbath” (vs 20).