Humanity could return to Eden if it changes

Fyodor Dostoyevsky : writer
There will be happy, blissful, loving, sinless humanity if it leaves mind for heart. People will again leave in harmony with each other, with animals and trees, there will be no violence, lie, jealousy, lust, hate, evil, if they leave the science as a deceitful tool for cognition of the truth, leave the idea of cognition and putting the desire of knowledge of life above life itself. People will live in Eden if they start loving others like themselves.
Though the abandoned Eden in the novel is from the past, and today's hell is the reality, people can return to Eden or transform the life on earth into paradise. It's a relative prediction, because it will happen only if humanity changes. "For I have seen the truth; I have seen and I know that people can be beautiful and happy without losing the power of living on earth. I will not and cannot believe that evil is the normal condition of mankind.And yet how simple it is: in one day, in one hour everything could be arranged at once! The chief thing is to love others like yourself, that's the chief thing, and that's everything; nothing else is wanted — you will find out at once how to arrange it all."

Fyodor Dostoyevsky, The Dream of a Ridiculous Man, novel