"He took the initiative and loved you by giving himself to you."
By giving his life. He died so we could have life.
"What better way can you imitate God?"
I don't think I can imitate God. Can you imitate God without making a fool of yourself or making it look like you're mocking him?
"Walking uprightly in effect involves living your life for others."
No man is righteous Romans 3:10-12. We shouldn't live our life serving others, we should live for God alone. Others will only bring you pain but God is the only one who will heal it.
"If you do not imbibe by this kingdom principle, you are far from prosperity."
The kingdom of God is not of this world John 18:36 (at least not yet). And we are instructed not to love the world or the pride of life that many now call "prosperity" 1 John 2:15-17.