If I were to summarize the fall of Adam and Eve in Genesis in one word, I would say it was 'an attempt to declare independence from God.'
Any attempt to become independent from God is a fall.
The core of Satan's attack in Genesis also starts here.

--- p.13

If the core of the human fall described in Genesis is freedom from God's intervention and independence from Him, then what level of "faith" is the faith God seeks to restore through Romans? This is faith: restoring lost trust in God.

--- p.14

Why would God make such a difficult request to Abraham—to leave behind the familiar and the places he had relied on—and then make such a difficult promise? The answer is simple.
God is now asking Abraham to have ‘faith,’ which is ‘faith in the very existence of God.’

--- p.15

I don't think Abraham was happy after suffering all his life and then having his son Isaac at the age of one hundred, in response to God's call.
I think Abraham was happy from the time he was seventy-five years old when he received God's vision.
Faith that leads to vision is because we see the dream without looking at the circumstances.
The strength to endure even in situations where one cannot help but despair is due to the hope that does not disappear even in such situations.
We must remember that hope is rooted in faith.

--- p.49

Let us remember that the gospel has enabled us to live a life of joy and happiness.
God has made us live joyful lives, not broken by any situation or circumstance.
Let us remember that by faith we have been justified and have peace with God, and we rejoice in the hope of his glory.
A gospel that cannot be enjoyed is not a gospel.

--- p.61

Our greatest challenge is to be happy in the Lord.
Because we cannot find happiness in the Lord, we keep seeking happiness outside of the Lord.
Happiness outside of the Lord is a derailment.
It's crossed the line.
We must find joy in the Lord.
No matter how hard Satan tries to steal our joy, it can never be taken away. Isn't this spiritual warfare? May we receive the grace to realize the Lord's wish, "Your joy will be complete," in our lives.

--- p.72

God is the one who carries out things according to God's plan.
You can't miss this trend.
No matter how the dog barks, God carries out His work of salvation in His sovereignty and according to His timing.

--- p.107

Heaven is not a place of abundance where there is no lack, so we should long for it, but rather a place to long for because the Lord is there.
Heaven is a happy place because it is a place where all rejoice is in Jehovah.
And today, the place where we live with Jesus Christ is heaven.

--- p.129

If left alone, this situation could lead to feelings of inferiority due to my smallness, but grace instead transforms my weakness into a will to live.
'God, I find that there are still so many things I lack.
I pray, 'God, who has worked so hard despite my many shortcomings, I will respond to your grace and fill in my weaknesses.'

--- p.163