And as in the days of Noe, so shall also the coming of the Son of man be.
In our times, the time of the New Testament, the New Covenant, millions of people have been given grace through baptism to hear God daily. We hear God in the daily Scriptures, at daily Mass if we are lucky enough to get to one, through other Catholic, orthodox, praying friends, through Mr. Voris, Father Z, EWTN, Salt and Light, Internet sources, through reading and studying, by being silent and reflecting.
We can hear
God because we are in sanctifying grace. Some listen.
In the Old Testament times, not all people heard the Lord, which is why the People of God had the prophets, teachers and leaders who did.
From Abraham down through John the Baptist, the Patriarchs and Prophets shared the Word of God with the people. Some listened.
In a time of tribulation, God allows the world to be covered in a darkness, in order to purify the elect and save many who otherwise are not paying attention.
Pay attention now.
If you are too busy to pray and reflect, you are too busy.
Soon, many if not all of us will find ourselves in a terrible state of not being able to hear God.
Christ warned Jerusalem of its destruction because the inhabitants refused to acknowledge Him as the Messiah.
Some left, most did not.
Hear the Lord while you can.
Pray to respond quickly to His Voice and to know when He is calling, speaking, nudging.
Soon, all human voices which share God's word will be stopped. You must learn to rely on Him alone.