Sometimes your beliefs don't work anymore. In fact it has been argued that if your belief system can be dismantled by simply questioning it, then it was either weak or became dysfunctional long ago. There aren't eternal truths, only truths good enough to answer as much as we can with our current experience of things. Socrates is usually seen as being in the transition era between the archaic-mythical-heroic greece and classical-philosophical greece precisely because it seems it was an era of radical changes in the nation which rendered their old beliefs dysfunctional and so they started questioning it.
Sometimes our beliefs are burdens.