Please at-least write what is your understanding till now
so I know that the semi-colon indicates support and I even decoded the second blank that needs to mention lack of energy and hence its indolence but I couldn’t make sense of the first part how is it a negative idea if the blank contains a negative word.
You’re right in noting that semicolons generally connect closely related ideas.
For this question, the structure of the sentence suggests that the idea in the second part (after the semicolon) should explain or elaborate on the idea in the first part.
For the first blank, we need a word that represents something people might lack the energy to be, which would otherwise contrast with virtue. A word like “vicious” or “malevolent” might work because these are generally seen as opposites to virtue. The overall sentence would then mean that if people lack the energy to be bad (vicious/malevolent), they should not be praised for being good, as their goodness is simply the result of their laziness (indolence) rather than a true moral choice.
However, I understand that filling the first blank with a negative word might seem counterintuitive when we’re trying to convey a negative idea. The structure of this sentence is a bit tricky in this regard. It’s stating a negative outcome (people should not be praised) based on a condition (if they lack the energy to be vicious/malevolent), and this condition is actually presented as a negative quality (lack of energy to be bad). So, while it might feel like a double negative, the sentence structure actually requires a word with negative connotations in the first blank to convey the overall negative idea.
yeah makes sense and I understood that I need to be more flexible with what the sentence is demanding and not on what my intuition says and as a result was just hung up on that part specifically 
but thanks a lot