How to enable an already disabled Component in Unity 5?

How to enable an already disabled Component in Unity 5?

Before it’s disabled, set a reference to it, use that reference to do SetActive(false), then the opposite when needed.

https://unity3d.com/learn/tutorials/modules/beginner/scripting/activating-gameobjects

There are many, many posts on this topic, so please search for more info if needed.