"If you realized how powerful your thoughts are" acknowledges the significant influence our thoughts have on our emotions, actions, and overall life experiences.
"You'd never think a negative thought again" suggests that an understanding of this power would deter us from entertaining negative or self-destructive thoughts. It implies that we would actively choose positive and constructive thinking patterns.
In essence, this quote emphasizes the importance of mindfulness and the positive impact of maintaining a constructive and optimistic mindset. It encourages us to recognize the transformative potential of our thoughts and to harness this power for our well-being.