What are some practical steps that we can take to stay alive to the beauty of God's world?
If we are unmerciful, unforgiving people, if we hold grudges or cherish resentments or plan revenge, then what we are saying in effect to God is, "This is the way I prefer life to be." And so he will give us what we have preferred at the day of judgment; no mercy, no forgiveness, but only vengeance. If Christ has not changed us (and I don't mean perfection, but only significant change), then probably we have never known him.
Don't trust in the kind of tree you are. If there is no fruit that accords with repentance, you will be destroyed.
It will take an infinite number of ages for God to be done glorifying the wealth of his grace to us. He will never be done.
Paul did not reinterpret the Scriptures. He only drew out what was taught in the Law and the Prophets.
The fight against lust is image against image. Don't just pray and wait and try to avoid. Actively put effort into seeing Jesus.
The answer is not simple. Some Biblical texts seem to say no. Others, yes.
How can I have peace or joy while living in a dangerous world?
There is nothing in itself that makes "forgiveness of sins" or justification good news. The gospel is more than that.
What should we do when it seems like one Biblical truth cancels out another?
Don't follow a defeated foe; follow Christ. You will be an exile in this age, but you will be free.