To lack conviction means to not have a firmly held belief or opinion. It can also refer to the inability or refusal to accept that something is true or real. People who lack conviction may feel out of control, vulnerable, and uncertain. They may struggle to stick to their beliefs and values, and may be easily swayed by others or circumstances. Conviction is the strong belief that a behavior is right, moral, and consistent with ones deeper values. It offers a kind of certainty and empowers individuals to reach a place where their values, beliefs, and character are non-negotiable.