For the gate is narrow and the way is hard that leads to life, and those who find it are few. (ESV)
But small is the gate and narrow the road that leads to life, and only a few find it. (NIV)

It occurs to me that the "narrow path" may be envisioned as not only a road with forks and corners (as many of us envision the "straight and narrow") -  but also as a sort of "foot path" - a straight and narrow foot path, making its way surely and carefully along the ridge of a mountain.

In the Badlands, and similar places, on one side of a path you will find a flat place - filled with cacti, sharp growing things, and maybe a few snakes and creepy crawly things.  On the other side is a steep and slippery slope.  If you step off the edge, you do not know how far you will slide.

In Michigan, on a Lake Superior cliff, I found a path.  On one side was a deep and dark woods, complete with poison ivy - a lot of it. On the other side, a steep slide into the pounding waves.

The path is there for a reason.  Somebody wise knew it was safe there.  The One who created the path gave us the Way.  Those who have gone before traveled the path safely.

On the path is safety.  Off the path is danger - and a slippery slope.

In a debate, "slippery slope" can be a logical fallacy (see here for "In Defense of the Slippery Slope")

It may also be a pattern.

The thing is...life is not a debate and there are slippery slopes that are real.  And have real dangers.

For example...any guess where the likes of Todd Bentley might end up?