"And the LORD said unto Cain, Why art thou wroth? and why is thy countenance fallen? If thou doest well, shalt thou not be accepted? and if thou doest not well, sin lieth at the door. And unto thee [shall be] his desire, and thou shalt rule over him." (Ge 4:6-7 AV)
This passage has always interested me especially in its preceding Abel's murder of his brother. This was a man who talked with God, not in prayer as we commune with the LORD but in discussion with the Living LORD. This was also a man who clearly was given a choice by God, a sincere choice to turn to Him and do what was right by God. Yet, he slew his brother nonetheless. Given the hand of opportunity by God, can we state that Cain was determined by God to kill Abel? If so, what does that speak to God's words and extension to Cain? Can we suggest the LORD was sincere if He had determined Cain's murderous actions? Certainly the LORD decreed the actions of Cain but in viewing His extended hand to Cain we should not consider that such decrees were necessary. Cain had a choice to make and he made the choice that suited him. The LORD decreed that choice and as such it was certain to occur yet because the LORD sincerely offered Cain an alternative that choice could not have been necessary but was omnisciently foreknown instead. Those comments made to Cain are certainly a conundrum of sorts but perhaps more so to those who advance determinist notions rather than those of us who understand the effect of God's grace upon the freed will of man.