there will be an apostacy

1 Tim 4:1 Now the Spirit speaketh expressly, that in the latter times some shall depart from the faith, giving heed to seducing spirits, and doctrines of devils

2 Thess 2:3 Let no man deceive you by any means: for that day shall not come, except there come a falling away first, and that man of sin be revealed, the son of perdition

Matthew 24:10-11 And then shall many be offended, and shall betray one another, and shall hate one another.   And many false prophets shall rise, and shall deceive many (see also Mark 13:5-6; 11-12, Luke 21:8; 16-17)

that which is perfect

1 Corinthians 13:8-13

Charity never faileth: but whether there be prophecies, they shall fail; whether there be tongues, they shall cease; whether there be knowledge, it shall vanish away.

For we know in part, and we prophesy in part.

But when that which is perfect is come, then that which is in part shall be done away.

When I was a child, I spake as a child, I understood as a child, I thought as a child: but when I became a man, I put away childish things.

For now we see through a glass, darkly; but then face to face: now I know in part; but then shall I know even as also I am known.  [See Revelation 22:4-6

And now abideth faith, hope, charity, these three; but the greatest of these is charity.

That which is perfect (Jesus) is when we shall see HIM face to face…   at THAT time prophecies, tongues, and knowledge will cease, what will endure will be faith, hope, and love.