Steroids DO increase both muscle mass and strength, and they do so very quickly as long as everything else is in place. Those who say "get there naturally" obviously haven't been involved in the sport of bodybuilding, since if they had, they would know that certain gains and proportions are impossible, no matter how good one's genetics are, without chemical enhancement. That said, there are side effects (many of which are exagerated in the popular media) and you should do your research before you consider running a cycle. Are you going to run injectibles or tabs, how long is your cycle, and what are your aims? Even for something like dianabol you'll need to consider post-cycle therapy, which involves other drugs. Tread carefully.