The word is often brushed over lightly. Here is an easy-to-follow article with Hebrew and Greek spelled out for you in English.
This is about God’s foreknowledge, choice, and human freewill. If we have the right perspective, we can reach sensible conclusions.
What is a biblical covenant? This is the post you need to read first in the biblical covenant series.
Let’s never give up on Christ’s sacrifice on the cross, leaving him up there as a mere martyr who was unfortunately put to death for being merely a good man. His sacrificial death is much deeper than that.
Has this covenant been fulfilled in Christ? If so, does this mean Israel does not have a right to exist as a Jewish state, as some Christians believe?