Faith and Shraddha are two concepts people often get confused.
Faith is more of a blind belief that encourage following without question.
Shraddha is the concept given in Buddhism.
This realization should come with learning and practicing Lord Buddha's words.More you realize more you believe.
Lord Buddha encouraged a Shraddha that is formed through realization rather than just believing.
Shraddha without reason (Blind following) is called "Amulika Shraddha" (Rootless Shraddha)
What is the object of faith/shraddha?
The object of Shraddha are - Triple gems
Buddha (Lord Buddha)
Dharma (Lord Buddha's teachings)
Once you reach the first step in the path "Sovan / Sothapanna" your Faith / Shraddha can't be shaken by anything.
So what about Four Noble Truths?
There are some things in Buddhism to believe,some to remember,some to practice and some to realize.
The Four Noble Truths come in the category - "To be realized"
So Four Noble Truths must be realized through practice of meditation and Dharma.It is not an object of worship or faith.It is simply the realization of holy Buddhas.
So you too must learn and practice in order to reach understanding and realization.