If one has the shield of truth in him/her, there is no power on Earth that can defame the person nor destroy his/hers principles and ethos that forms the basis of their existence.
This is essentially because truth is synonymous to God being the mechanism of spiritual communication.
Being spiritual is a rajasic guna attribute for it is conserving and harmosing through holding a balance between good (sattvic) and evil (tamasic) guna attributes. No one can destroy one who holds the middle ground at its peak for he/she is fully aware of the reality that he/she is confronted with and automatically refrains from confronted with having the wherewithal to do so in the interest of peace. Only a rajasic person has the ability to survive with dignity in his house of shelter in liberty.