Grease is added to gear wheels to facilitate movement and to prevent wear and tear.
Discussions are a little bit like gears in an engine.
Ideas are brought forth. Then our imaginations put them into motion as we ponder the consequences.
"We need resources to solve these problems."
"Money is tight. Can we reallocate funds or adjust our goals?"
In a good discussion, ideas mesh, propel each other, and move the enterprise forward.