"True faith" refers to a strong belief and trust in something or someone, without doubts or uncertainties. It means having complete confidence in the object of faith. Full definition
Because they are truly dedicated and have true faith in what they believe. (religion.blogs.cnn.com)
There are plenty of them... Your logic is deficient, and your lack of true faith apparent. (religion.blogs.cnn.com)
Combined with true faith this message will lead you to freedom from negative emotions such as anxiety or existential fears (one of the key sources of deadly free radicals). (fullhealthsecrets.com)