Paul writes in the beginning of 2 Corinthians about comfort in Jesus. We must also remember that Jesus told us in Matthew 10:34 and Luke 12:51 that He did not bring peace but division. So we cannot equate comfort  with peace.

Paul tells the church that they have gone through many hardships. “But this happened that we might not rely on ourselves but on God…”
What would happen if we relied on God instead of ourselves? Would the hardships be less? Paul also mentions that he suffered in Asia so much so that they despaired even of life. Is this hardship because Paul went to Asia when he wasn't supposed to go? See Acts 16:6,7.

“For we are not unaware of his schemes.”
What schemes? Satan's schemes are not always blatant and "in your face". Most often they are very subtle. Check out the Chronological Chronicles on the website for a writing entitled Too Busy? It tells all about Satan’s schemes!

Chapters 2 and 3 contain some vivid contrasting images.
Smell of death - fragrance of life
Tablets of stone - tablets of human hearts
The letter (of the Law) kills - the Spirit (Jesus' ultimate sacrifice) gives life

“And we, who with unveiled faces all reflect the Lord’s glory, are being transformed into his likeness with ever-increasing glory, which comes from the Lord, who is the Spirit.”
We are constantly being transformed into the likeness of Christ, if we allow it and work toward it.

“We are therefore Christ’s ambassadors, as though God were making his appeal through us.”
What an awesome responsibility and privilege!

“Therefore come out from them and be separate…”
When we step out of worldliness and into Godliness, we are different. This difference will attract others. We will be that "light" shining in the "darkness".

“Since we have these promises, dear friends, let us purify ourselves from everything that contaminates body and spirit, perfecting holiness out of reverence to God.”
What contaminates body and spirit?

“Each man should give what he has decided in his heart to give, not reluctantly or under compulsion, for God loves a cheerful giver. And God is able to make all grace abound to you, so that in all things at all times, having all that you need, you will abound in every good work.”
Notice all the "alls". The Scripture containing all the "alls" follow the Scripture containing words about giving cheerfully! Any connections???