Law of action and reaction for life
In life we find many experiences, in relation to these experiences many of us think that life punishes and rewards at the same time, however in particular I think that this is not so, far from this reality life gives us the opportunity to live and experience the consequences of our actions.
When we do badly in life we do not know why it is, however, it is most likely that the bad thing is a consequence of something we have done.
Newton's third law (law of action and reaction) not only explains motion as that phenomenon in which a force is returned with the same magnitude but in a different direction, but also makes us understand that the bad and the good in life are the consequences of our actions.
We may think that there are times when we act well but we do badly, however in order to understand this behavior we must make a general balance of our actions, we must be aware that we are not perfect, and that any bad action in the past may result in a failure in the present.
The moral of the case is that thinking that life is a box of surprises that gives us rewards and punishments, is the most mistaken thing we can understand, since life gives us the same as we give it.