I would just like to say that the Catholic & Coptic church are very different but the Roman Catholic Church and the Coptic Orthodox Church are similar in many ways, but disagree on some key points and that's what differentiates them from us. So …
I would recommend a book named "Practical Spirituality" by: Father Athanasius Iskander..
its great! there is alot about Dicipline of the mind, the will, the senses, the memory & imagination, presumptuous sins, the pursuit of virtues etc.
i dont think we should be questioning when the world will come to an end because it is God's decision. It will happen when it happens... science cannot proove anything against our God.
Coptic Love
I don't really think that it can be wrong to feel warm feelings about Jesus. How can it be wrong when your just showing your emotions and what you feel about him. Its love.
Coptic Love