Why did Cain choose this specific time to bring his offering? What was the deeper meaning behind his 'gift'?
The phrase 'in process of time' (literally, 'at the end of days') suggests a significant period has passed since creation. This wasn't a spontaneous, out-of-the-blue act. Commentators suggest it could mean after a harvest, a year's end, or even at the end of a week.
Regardless of the exact timing, the key is that it was a deliberate act. Cain brought 'a gift' (Hebrew: minchah), which could be a present or a tribute. It signifies an outward expression of worship, a way to approach God. The purpose was likely twofold: gratitude for the earth's bounty and an attempt to win favor or avert displeasure. It was understood that one shouldn't approach God empty-handed.