Whats hiding inside?

Responsibility - Bill. It. I'll. Sion.

Irresponsibility - It.Bill.I'll.

self-directed - Ted. Cert.Self.

Purpose - Pose.Rose.

Author - A.hour.

Quadrilateral - Later.Rat.Drill.

Symmetry - Me.Try.Yet.

Net - Te.Net.

Right - Hit.