Invisible except to abstract thought

Invisible except to abstract thought
We see them with an eye we  must construct
The transcendental numbers came unsought

We only know a few, so we were taught.
Pi and e from inner space were plucked
Invisible except to abstract thought

Even  calling zero, number naught
Was   very  hard  just like the empty set
The transcendental numbers came unsought

Once we defined real  numbers then we light
The way to finding what we now detect.
Invisible except to abstract thought

Danger lurks where men have taken flight,
Into the abstract world without respect.
The transcendental numbers were not sought

Like we  put a plug in to connect
We may be shocked by feeling its effects.
Invisible except to abstract thought,
The transcendental numbers ,  hardly bought