In this Gospel Jesus told us to avoid making a show of it when we are giving alms, fasting, or praying. We might think that the big point he is making is that we should not be hypocrites, but there is something more important than that here.
What does Jesus say will happen if we avoid making a show of our good behavior? He says, “Your Father who sees in secret will repay you.”
Looked at another way, Jesus was telling us that having people think well of us is less important than pleasing the Father. In other words, what is of most value to us in this life is to have an ever deepening personal relationship with the Father.