Surely not, though
Many people donate to charity, volunteer, do aid work in poorer countries - surely these are deeds that are good. I believe humans lean
to good rather than from it. Some, maybe even many of them do not do it for a reward, especially not an eternal reward.
"If people are good only because they fear punishment, and hope for reward, then we are a sorry lot indeed." -- Albert Einstein
(Sorry, had to
)
Many do it because they would like to be able to help minimize suffering, even if just a little bit. It's egoism, selfishness, attachment and greed, and just general criminology that bring people to evil.
I'm not a fan of Paul, if I'm honest. I think there were certain issues going on in his life that made him hate himself, which is why he wrote such things.
As to nothing good dwells in mankind Biblically speaking...
Matthew 7:9-10 "
Which of you, if his son asks for bread, will give him a stone? Or if he asks for a fish, will give him a snake?" - Jesus here shows that he believed that humans
do have some empathy. So, imagine if we consider all to be our siblings and children, how much good we can do. Love your neighbour as yourself and all that.
I know, in the next verse, Jesus says "though you are evil", I don't believe this means that people are
inherently evil, but that usually* even the most wicked of humankind has a sense of empathy and is capable of doing good things.
This is my take on it, anyway