The correct answer to this open question is the following.
Stoicism is similar to the philosophies of Plato, Epicureo, and Aristotle in that considereing wisdom as a virtue that makes humans happy. For this to happen, humans have to trust and rely on their interior, not the exterior. Happines should not come from external situations but due to internal peace and tranquility that is expressed throughout our conduct. As life is short and things happen that could represent a risk, stoicism invites to overcome sad moments and bad emotions.