Human beings are not intrinsically selfish, which isolates us from others. We are essentially social animals who depend on others to meet our needs. We achieve happiness, prosperity and progress through social interaction. Therefore, having a kind and helpful attitude contributes to our own and others' happiness.
Inner darkness, which we call ignorance, is the root of suffering. The more inner light that comes, the more darkness will diminish. This is the only way to achieve salvation or nirvana.
It is also possible within this lifetime to enhance the power of the mind, enabling one to reaccess memories from previous lives. Such recollection tends to be more accessible during meditative experiences in the dream state. Once one has accessed memories of previous lives in the dream state, one gradually recalls them in the waking state.
Every man has the basis of good. Not only human beings, you can find it among animals and insects, for instance, when we treat a dog or horse lovingly.
Buddhism does not accept a theory of God, or a creator. According to Buddhism, one's own actions are the creator, ultimately. Some people say that, from a certain angle, Buddhism is not a religion but rather a science of mind.