en_tn/2pe/01/19.md

We have this prophetic word made sure

Peter is referring to the apostles. The apostles have the message from the prophets that they know is the truth from God. (See: rc://en/ta/man/translate/figs-exclusive)

to which you do well to attend

Peter is saying to the believers to pay close attention to the prophetic message.

It is like a lamp shining in a dark place until the morning comes

The prophetic word is compared to a lamp that gives light in the dark until light comes in the morning. (See: rc://en/ta/man/translate/figs-simile)

and the morning star rises in your hearts

The morning star is Christ coming to live in the believers heart. (See: rc://en/ta/man/translate/figs-metaphor)

but by men carried along by the Holy Spirit who spoke from God

Men who were controlled by the Holy Spirit and spoke what God told them.