Saint Anthony of the Desert made this prediction in the 4th century.
“Men will surrender to the spirit of the age. They will say that if they had lived in our day, Faith would be simple and easy. But in their day, they will say, things are complex; the Church must be brought up to date and made meaningful to the day’s problems. When the Church and the world are one, then those days are at hand because our Divine Master placed a barrier between His things and the things of the world.”
Read this and other prophecies at CatholicProphecy.org