The process of living seems to consist in coming to realize truths so ancient and simple that, if stated, they sound like barren platitudes. They cannot sound otherwise to those who have not had the relevant experience: that is why there is no real teaching of such truths possible and every generation starts from scratch.
The mercy of forgiveness is brought from the strength to accept any situation given and faced. Spiritual independence and humbleness toward life makes life like a flowing river of release. What happens will happen anyways, and everybody can make mistakes. The important thing is to learn how to make a better future from the mistake.