Final answer:
As an Athenian citizen without a government position, you would voice your opinion by attending the Assembly, where decisions were made and policies were discussed and voted upon.
Step-by-step explanation:
If you were an Athenian citizen and did not hold a government position, you would voice your opinion by attending the Assembly. The Assembly was a gathering of all adult male citizens where important decisions were made and policies were discussed and voted upon. By participating in the Assembly, you could express your views and have a direct impact on the political process.