God "declared the end from the beginning," so that end was fixed by His own purpose in creating.
"And when the Gentiles heard this, they were glad, and glorified the word of the Lord: and as many as were ordained to eternal life believed." -- Acts 13:48 "For the children being not yet born, neither having done any good or evil, that the purpose of God according to election might stand, not of works, but of him that calleth" -- Romans 9:11
Yes, it's difficult to wrap our minds around this truth, but it's truth nonetheless. Election is founded on God's good pleasure alone, and not on any prudent effort, choice, decision or work of men.
The love we feel for God is a reflection of the love God first feels for Jesus Christ. It's all of Him; and thus it's all of grace; only of grace.
Yes, and He saw that it was good, so anyone who cannot understand this needs to eep on trying
Yes, it's difficult to wrap our minds around this truth
If you're referring to Calvinism, yes. Especially when our experience is evidence against it in every waking moment.