Well, it's a big subject. As I say in my series on the Christ myth theory, I doubt much if anything can be known about the historical Jesus, so we'd be talking about the character from the gospels, or inferring what an executed Jewish preacher would have been like at that time and place.
My point isn't that Jesus talks solely about the afterlife. The question is what someone would be like whose number one commandment is to love God with everything you have. Jesus's ethics are based on the otherworldly assumption that God's judgment of humanity is arriving soon, or at least that that judgment is vastly more important than any worldly issue. So yes, Jesus talked about ethics for living in this world, but those uncompromising ethics of renunciation become remotely tenable only on the otherworldly, apocalyptic, countercultural assumptions.
Jesus said the first will be last, and the last will be first. The rich will have a harder time passing God's judgment than a camel would have passing through the eye of a needle. So those who ignore the one true God and prioritize worldly matters will likely end up in Hell, according to Jesus, in which case they couldn't possibly rule in God's kingdom.
