Thanking God in Good Times and in Bad

In our Gospel of the healing of the ten lepers, Jesus tells the Samaritan man who returned to thank him, "Your faith has saved you." It does seem that there is a connection between thanksgiving and faith: If we have faith and trust in the goodness of God our Father, then we will be able to thank him for everything he is doing in our life, whether in "good times" or in "bad times".