Happiness. Seneca and St. Augustine
According to the stoics, happy life is based on the agreement of its nature and it begins when your soul is healthy and busy.

Seneca says that everyone wants to live happily, but nobody has discovered what makes life happier because the more we seek it, the further we move away from it. To study what the object of our aspirations is, write your little treatise On Happy Life.
In one of his first considerations warns that we must be careful not to follow like sheep the opinion of the majority because it is usually never a reliable criterion of truth, but quite the opposite.
Seneca thinks that there is a better light to discern the true from the false, in one's soul, where one can review life and discover that many desires and works do not give us any happiness.
According to the Stoics, happy life is one that agrees with its nature and comes to it if the soul is healthy and occupied, without restlessness, in the search for the sovereign good of the soul. The immutable foundation of a happy life is for Seneca, the righteousness and firmness of judgment and warns that everything will fail if it is sought as the best that will not make us better.
For Seneca there´s a high concept of man's ability to rise above his passions using judgment and reason, the will that shape his nature, according to which he must live, but it is not easy and men deviate in search of happiness in the PO to be, in knowledge, in power, in pleasure and harvesting pain and unhappiness.
St. Augustine also sought happiness in various ways. He applied his formidable intelligence to inquire about it and concluded that happy life consists of enjoying The Truth (capitalized) even if everyone confesses, they prefer truth above lying and they do not seek the absolute truth to serve as a foundation for others.
Before and now we often accept the truths that benefit us and are comfortable for us, and we reject those that can impose duties on us or question our behavior.
The relativism that corrodes us proclaims, without rebozo, that all truths are equivalent and invoking tolerance, discourages us from seeking the absolute truth on how we must build our lives. Naturally, every day we are less happy we confuse happiness with the welfare state, each day more deteriorated.
We must recognize the effort of Seneca and the Stoics to find happiness in virtue and not in pleasures and face death with fortitude, but St. Augustine goes further because, by questioning himself, he concludes that we are all creatures of Someone. That's why he exclaims you made us for You and our heart is restless until he rests in You! Resting in God is eternal bliss. Death is not the end of anything.
But bent on erasing God from our world, to be our gods, we have invented implausible fables that give no reason about the wonderful fact of existing. The universe is not by pure chance, nor man the blind product of the evolution of matter. God is close to each of us, within us. We only need to open ourselves to his action by repeating with St. Augustine: late I loved you, beautiful beauty so old and so new, late I loved you! Life, joys and sufferings, it is different when we put our hope in God.