Translation of "to muse" into Spanish

Here's a theory from someone who's had several hours to muse on it.

Ésta es la teoría de alguien que lo ha cavilado varias horas:

I began to muse if I could hold to the bargain.

Empecé a meditar si yo podría mantener el acuerdo.

A good artist has no time to muse, he should create.

El artista bueno no tiene tiempo para pensar, el crea.